diff --git a/hw3/01-routing.js b/hw3/01-routing.js
index d73fdda..e606741 100644
--- a/hw3/01-routing.js
+++ b/hw3/01-routing.js
@@ -24,6 +24,9 @@ const server = http.createServer((req, res) => {
     'other',
   ];
 
+  // accesses CONST routes list and return an html element
+  // <a></a> turns the element content into a hyperlink. 
+  // href specifies the link which the hyperlink goes to
   let getRoutes = () => {
     let result = '';
 
@@ -43,7 +46,67 @@ const server = http.createServer((req, res) => {
     res.end();
   }
 
-  // Add your code here
+  else if (req.url === '/welcome') {
+    let routeResults = getRoutes();
+
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+    res.write(`<h1>Welcome to HW #3!</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+    res.end();
+  }
+
+  else if (req.url === '/redirect') {
+    res.writeHead(302, { Location: "/redirected" });
+    res.end();
+  }
+
+  else if (req.url === '/redirected') {
+    let routeResults = getRoutes();
+
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+    res.write(`<h1>Redirected to /redirected</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+    res.end();
+  }
+
+  else if (req.url === '/cache') {
+    let routeResults = getRoutes();
+
+    res.writeHead(200, { 'Content-Type': 'text/html', 'Cache-control': 'public, max-age=86400'});
+    res.write(`<h1>This resource was cached</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+    res.end();
+  }
+
+  else if (req.url === '/cookie') {
+    let routeResults = getRoutes();
+
+    res.writeHead(200, { 'Content-Type': 'text/html', 'Set-Cookie':'hello=world'});
+    res.write(`<h1>cookies... yummm</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+    res.end();
+  }
+
+  else if (req.url === '/check-cookies') {
+    let routeResults = getRoutes();
+    
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+
+    if(req.headers.cookie.indexOf("hello=") !== -1){
+      res.write(`<h2>yes</h2>`);
+    } else {
+      res.write(`<h2>No</h2>`);
+    }
+    res.end();
+  }
+
+  else {
+    res.writeHead(404, {'Content-Type': 'text/html'});
+    res.write(`<h2>Error 404 - Page not Found</h2>`);
+    res.end();
+  }
+
+
 });
 
 server.listen(port, () => {
diff --git a/hw3/02-url.js b/hw3/02-url.js
index 00ca7d1..df8aa77 100644
--- a/hw3/02-url.js
+++ b/hw3/02-url.js
@@ -30,9 +30,75 @@ const server = http.createServer((req, res) => {
     res.write(`<h1>Exercise 02</h1>`);
 
     res.write(`<ul> ${routeResults} </ul>`);
+  } 
+
+  
+  else if (req.url.indexOf('/attributes') >= 0){
+    let routeResults = getRoutes();
+    const table = createTableHTML(req.url);
+
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+    res.write(`<h1>hello world & lorem ipsum</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+    res.write(table);
   }
 
-  // Add your code here
+  else if (req.url.indexOf('/items') >= 0){
+    let routeResults = getRoutes();
+    const table = createTableHTML(req.url);
+
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+    res.write(`<h1>hello world & lorem ipsum</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+    res.write(table);
+  }
+
+  else if (req.url.indexOf('/characters') >= 0){
+    let routeResults = getRoutes();
+    const table = createTableHTML(req.url);
+
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+    res.write(`<h1>hello world & lorem ipsum</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+    res.write(table);
+  }
+
+  function createTableHTML (url) {
+    let dataset = parsedDataFromURL(url);
+    let results = "";
+
+    results += `<table border=1px>`;
+      dataset.forEach(
+        row => {
+              results += `<tr>`
+                row.forEach(
+                  data => results += `<td>${data}</td>`
+                ),
+
+              results += `</tr>`
+        }
+      )
+    results += `</table>`;
+
+    return results;
+  } 
+
+  function parsedDataFromURL (url) {
+    let parsedURL = url.split("?");
+    let temp1 = parsedURL[1];
+    let parsedArgs = temp1.split("&");
+
+    let results = [];
+    let temp = [];
+
+    // [1=1, 2=2...]
+    parsedArgs.forEach(
+      arg => results.push(arg.split("="))
+    )
+
+    return results;
+  }
+  
 
   res.end();
 });
diff --git a/hw3/03-form.js b/hw3/03-form.js
new file mode 100644
index 0000000..480c449
--- /dev/null
+++ b/hw3/03-form.js
@@ -0,0 +1,106 @@
+const http = require('http');
+
+const port = process.env.PORT || 5000;
+
+const formHTML = `<html>
+            <head>
+              <meta charset="UTF-8" />
+              <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+              <meta http-equiv="X-UA-Compatible" content="ie=edge" />
+              <title>03 - Form</title>
+              <link
+                rel="stylesheet"
+                href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css"
+              />
+
+            </head>
+            <body class="bg-dark">
+              <form class="bg-light border rounded w-50 mx-auto mt-5 p-3" method='post' action="/submit">
+                <h1 class="mt-2 mb-4">Contact Form</h1>
+                <h6>Name *</h6>
+                <input type="name" name="name" class="form-control" aria-label="name" id="inputname" aria-describedby="basic-addon1">
+                <h6>Email *</h6>
+                <input type="email" name="email" class="form-control" aria-label="email" id="inputemail" aria-describedby="basic-addon1">
+                <h6>Submit your message:</h6>
+                <textarea type="comment" name="comment" class="form-control" aria-label="msgsubmission" id="inputcomment"></textarea>
+                <div class="form-check">
+                  <input class="form-check-input" type="checkbox" name="newsletter" id="newsletterCheckbox" checked>
+                  <label class="form-check-label" for="flexCheckChecked">
+                    Sign up the newsletter
+                  </label>
+                </div>
+
+                <br>
+                <button type="submit" class="btn btn-primary btn-lg btn-block" >Submit</button>
+                </div>
+              </form>
+            </body>
+          </html>`
+
+
+
+const server = http.createServer((req, res) => {
+  const routes = [
+    '/form',
+    '/submit'
+  ];
+
+  let body = "";
+  
+  // use the URL interface to work with URLs
+  // source: https://developer.mozilla.org/en-US/docs/Web/API/URL
+  let url = new URL(req.url, `http://${req.headers.host}`);
+
+  let getRoutes = () => {
+    let result = '';
+
+    routes.forEach(
+      (elem) => (result += `<li><a href="${elem}">${elem}</a></li>`)
+    );
+
+    return result;
+  };
+
+  req.on("data", (chunk) => {
+    body += chunk;
+    console.log("on data: " + body);
+  });
+
+
+  req.on("end", () => {
+  if (req.url === '/') {
+    let routeResults = getRoutes();
+
+    res.writeHead(200, { 'Content-Type': 'text/html' });
+    res.write(`<h1>Exercise 03</h1>`);
+    res.write(`<ul> ${routeResults} </ul>`);
+  } 
+
+  else if (req.url === '/form') {
+    res.writeHead(200, { 'Content-Type': 'text/html'});
+    res.write(formHTML);
+  }
+
+  else if (req.url === '/submit') {
+    const params = new URLSearchParams(body);
+
+    res.writeHead(200, { 'Content-Type': 'text/html'});
+    res.write(`<h2>Name: ${params.get("name")}</h2>`);
+    res.write(`<h2>Email: ${params.get("email")}</h2>`);
+    res.write(`<h2>Comments: ${params.get("comment")}</h2>`);
+
+    if( params.get("newsletter") ){
+      res.write(`<h2> Newsletter: Yes, sign me up for the newsletter.</h2>`);
+    } else {
+      res.write(`<h2> Newsletter: No, thank you.</h2>`);
+    }
+  }
+
+  res.end();
+  })
+});
+
+server.listen(port, () => {
+  console.log(`Server running at http://localhost:${port}`);
+});
+
diff --git a/hw4/01-routing.js b/hw4/01-routing.js
index 72f066a..86d332b 100644
--- a/hw4/01-routing.js
+++ b/hw4/01-routing.js
@@ -34,15 +34,53 @@ let getRoutes = () => {
 app.get('/', (req, res) => {
   let routeResults = getRoutes();
 
-  res.writeHead(200, { 'Content-Type': 'text/html' });
-  res.write(`<h1>Exercise 04</h1>`);
-  res.write(`<ul> ${routeResults} </ul>`);
+  res.status(200);
+  res.set({'Content-Type': 'text/html'});
+  res.send(`<h1>Exercise 04 - Root Page</h1>
+            <ul> ${routeResults} </ul>`);
+  //res.send(`<ul> ${routeResults} </ul>`);
   res.end();
 });
 
-app.get('/welcome', (req, res) => {});
+app.get('/welcome', (req, res) => {
 
-// Add your code here
+  res.send('GET request to the welcome page');
+});
+
+app.get('/redirect', (req, res, next) => {
+
+  console.log("Redirecting to /redirect");
+  res.status(302);
+  res.redirect('/redirected');
+  next();
+})
+
+app.get('/redirected', (req, res) => {
+
+  res.status(200);
+  res.set({'Content-Type': 'text/html'});
+  res.send("ur in /redirected");
+  res.end();
+})
+
+app.get('/cache', (req, res, next) => {
+  let MAXAGE = 86400;
+  res.set('Cache-Control', `public, max-age=${MAXAGE}`)
+  res.send("this resource was cached btw");
+  res.end();
+  next();
+})
+
+app.get('/cookie', (req, res, next) =>{
+  res.set('Cookie', `hello=world`)
+  res.send("yum COOKIES!!!");
+  res.end();
+  next();
+})
+
+app.get('*', (req, res, next) => {
+  res.send("404 error. where do u think ur going???", 404); 
+})
 
 app.listen(port, () => {
   console.log(`Server running at http://localhost:${port}`);
diff --git a/hw4/02-sessions.js b/hw4/02-sessions.js
index 89c460e..36ce5ce 100644
--- a/hw4/02-sessions.js
+++ b/hw4/02-sessions.js
@@ -3,15 +3,55 @@ const session = require('express-session');
 const app = express();
 const port = process.env.PORT || 5000;
 
-// Add your code here
+// Global variables
+let pathHistory = [];
+
+function addPath(path){
+  if(path.includes('/favicon.ico') === true){
+    return; 
+  }
+  else if(pathHistory.includes(path) === false){
+    pathHistory.push(path); 
+  }
+  return;
+}
+
+function displayPath(path){
+  if(pathHistory.length === 0 || pathHistory.length === 1 && pathHistory.includes(path)){
+    return `Welcome to http://localhost:5000${path}`;
+  } else {
+    let toDisplay = `<p>Previously visited:</p>`;
+    pathHistory.forEach((subPath, i) => {
+      toDisplay += `<ul>${subPath}</ul>`;
+   }) 
+    return toDisplay;
+  }
+
+  return;
+}
 
 // Use the express-session module
-app.use(/** ... */);
+app.use(
+  session({
+    secret: 'secret code',
+    resave: 'false',
+    saveUninitialized: false,
+  })
+);
 
-app.get('/', (req, res) => {
-  // Add your code here
+app.get('/*', (req, res) => {
+   const path = req.url;
+
+   res.status(200);
+   res.set({'Content-type': 'text/html'});
+   res.write(`<p>Currently on route: ${path}</p>`);
+   res.write(displayPath(path));
+   res.end();
+
+   addPath(path);
 });
 
+
 app.listen(port, () => {
   console.log(`Server running at http://localhost:${port}`);
 });
diff --git a/hw4/03-form.js b/hw4/03-form.js
index 25bd30f..585d96e 100644
--- a/hw4/03-form.js
+++ b/hw4/03-form.js
@@ -2,6 +2,7 @@ const express = require('express');
 const app = express();
 const port = process.env.PORT || 5000;
 
+// Reference to index.html is performed here
 // Use middleware static() to serve all static files in the given folder
 app.use(express.static('public'));
 
@@ -9,8 +10,21 @@ app.use(express.static('public'));
 app.use(express.urlencoded({ extended: false }));
 
 // POST request
-app.post('', (req, res) => {
-  // Add your code here
+app.post('/submit', (req, res) => {
+  const name = req.body.name === '' ? 'N/A' : req.body.name;
+  const email = req.body.email === '' ? 'N/A' : req.body.email;
+  const comment = req.body.comment === '' ? 'N/A' : req.body.comment;
+  const newsletter = req.body.newsletter === undefined ? 'No, do not sign me up' : 'Yes, sign me up';
+
+  res.status(200);
+  res.set({'Content-type': 'text/html'});
+
+  res.write(`<h1>Name: ${name}</h1>`);  
+  res.write(`<h1>Email: ${email}</h1>`);  
+  res.write(`<h1>Comments: ${comment}</h1>`);
+  res.write(`<h1>Newsletter: ${newsletter}</h1>`);
+  res.end(); 
+
 });
 
 app.listen(port, () => {
diff --git a/hw4/04-templates.js b/hw4/04-templates.js
index 4fe5fba..d18c5bb 100644
--- a/hw4/04-templates.js
+++ b/hw4/04-templates.js
@@ -12,6 +12,115 @@ app.set('view engine', 'pug');
 const url = 'https://restcountries.com/v3.1/all';
 
 // Add your code here
+async function fetchCountries(url){
+  let countries =[];
+  await fetch(url)
+  .then((response) =>{
+    return response.json();
+  })
+  .then((myJson) => {
+    myJson.forEach(object => {
+      if(object.capital !== undefined){
+        countries.push(object.capital);
+        console.log(object);
+      }
+    })
+  })
+  .catch((error) => {
+    console.log(error);
+  });
+  return countries;
+}
+
+function sortAscendingList(list){
+  return list.sort((a,b) => a < b ? -1 : 1);
+}
+
+function sortDescendingPopulous(name, population){
+  let results = [];
+  let list = new Map();
+
+  for( let i = 0; i < name.length; i += 1){
+    list.set(name[i], population[i]) 
+  }
+
+  let mapDescPop = new Map([...list.entries()].sort((a, b) => b[1] - a[1]));
+
+  console.log(mapDescPop);
+  for(const [name, population] of mapDescPop){
+    results.push(`${name} - ${population}`);
+  }
+
+  console.log(results);
+
+  return results;
+}
+
+function sortSummarizeRegions(list){
+  let results =[]; 
+  let map = new Map(); 
+
+  list.forEach(region => {
+    map.set(region, map.get(region) + 1 || 1);
+  }) 
+
+  for(const [region, value] of map){
+    results.push(`${region} - ${value}`);
+  }
+
+  console.log(map);
+
+  return results;
+}
+
+async function fetchPopulous(url){
+  let results = [];
+
+  let common = [];
+  let populous = [];
+  await fetch(url)
+  .then((response) =>{
+    return response.json();
+  })
+  .then((myJson) => {
+    myJson.forEach(object => {
+      if(object.capital !== undefined){
+        if(object.population >= 50000000){
+          common.push(object.name.common);        
+          populous.push(object.population);
+        }
+      }
+    })
+
+    results = sortDescendingPopulous(common, populous); 
+  })
+  .catch((error) => {
+    console.log(error);
+  });
+  return results;
+}
+
+async function fetchRegions(url){
+  let results = [];
+
+  let regions = [];
+
+  await fetch(url)
+  .then((response) =>{
+    return response.json();
+  })
+  .then((myJson) => {
+    myJson.forEach(object => {
+      regions.push(object.region);
+    })
+
+    results = sortSummarizeRegions(regions);
+  })
+  .catch((error) => {
+    console.log(error);
+  });
+  return results;
+}
 
 app.get('/', (req, res) => {
   // render pug template for the index.html file
@@ -20,18 +129,22 @@ app.get('/', (req, res) => {
     heading: 'Countries of the World',
     main: 'Welcome to this application. Using the REST Countries API, we will be showing the countries and capitals of the world, the most populous countries in the world, and the number of countries in each region of the world',
   });
+
 });
 
 app.get('/capitals', (req, res) => {
   // map the output array to create an array with country names and capitals
   // check for empty data in the output array
+  let countries = [];
+  (async() => {
+    countries = await fetchCountries(url);
+    countries = sortAscendingList(countries);
+    res.render('page', {
+      heading: 'Countries and Capitals',
+      results: countries,
+    });
+  })();
 
-  let countries = ['Afghanistan', 'Aland Islands', 'Albania'];
-
-  res.render('page', {
-    heading: 'Countries and Capitals',
-    results: countries,
-  });
 });
 
 app.get('/populous', (req, res) => {
@@ -39,24 +152,31 @@ app.get('/populous', (req, res) => {
   // sort the resulting array to show the results in order of population
   // map the resulting array into a new array with the country name and formatted population
 
-  let populous = ['China', 'India', 'United States of America'];
+  let populous = [];
+  (async() => {
+    populous = await fetchPopulous(url);
+    res.render('page', {
+      heading: 'Most Populous Countries',
+      results: populous,
+    });
+  })();
 
-  res.render('page', {
-    heading: 'Most Populous Countries',
-    results: populous,
-  });
 });
 
 app.get('/regions', (req, res) => {
   // reduce the output array in a resulting object that will feature the numbers of countries in each region
   // disregard empty data from the output array
 
-  let regions = ['Asia - 50', 'Europe - 53', 'Africa - 60'];
+  let regions = [];
+
+  (async() => {
+      regions = await fetchRegions(url);    
+      res.render('page', {
+        heading: 'Regions of the World',
+        results: regions,
+    });
+  })();
 
-  res.render('page', {
-    heading: 'Regions of the World',
-    results: regions,
-  });
 });
 
 app.listen(port, () => {
diff --git a/hw4/package-lock.json b/hw4/package-lock.json
index 5baba78..26a6ba7 100644
--- a/hw4/package-lock.json
+++ b/hw4/package-lock.json
@@ -6,7 +6,8 @@
     "": {
       "dependencies": {
         "axios": "^0.21.1",
-        "express": "^4.17.1",
+        "express": "^4.18.2",
+        "express-session": "^1.17.3",
         "pug": "^3.0.2"
       }
     },
@@ -36,12 +37,12 @@
       }
     },
     "node_modules/accepts": {
-      "version": "1.3.7",
-      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.7.tgz",
-      "integrity": "sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==",
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
+      "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
       "dependencies": {
-        "mime-types": "~2.1.24",
-        "negotiator": "0.6.2"
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
       },
       "engines": {
         "node": ">= 0.6"
@@ -93,29 +94,32 @@
       }
     },
     "node_modules/body-parser": {
-      "version": "1.19.0",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.0.tgz",
-      "integrity": "sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==",
+      "version": "1.20.1",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
+      "integrity": "sha512-jWi7abTbYwajOytWCQc37VulmWiRae5RyTpaCyDcS5/lMdtwSz5lOpDE67srw/HYe35f1z3fDQw+3txg7gNtWw==",
       "dependencies": {
-        "bytes": "3.1.0",
+        "bytes": "3.1.2",
         "content-type": "~1.0.4",
         "debug": "2.6.9",
-        "depd": "~1.1.2",
-        "http-errors": "1.7.2",
+        "depd": "2.0.0",
+        "destroy": "1.2.0",
+        "http-errors": "2.0.0",
         "iconv-lite": "0.4.24",
-        "on-finished": "~2.3.0",
-        "qs": "6.7.0",
-        "raw-body": "2.4.0",
-        "type-is": "~1.6.17"
+        "on-finished": "2.4.1",
+        "qs": "6.11.0",
+        "raw-body": "2.5.1",
+        "type-is": "~1.6.18",
+        "unpipe": "1.0.0"
       },
       "engines": {
-        "node": ">= 0.8"
+        "node": ">= 0.8",
+        "npm": "1.2.8000 || >= 1.4.16"
       }
     },
     "node_modules/bytes": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.0.tgz",
-      "integrity": "sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==",
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
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diff --git a/hw4/package.json b/hw4/package.json
index 8e796ac..7761547 100644
--- a/hw4/package.json
+++ b/hw4/package.json
@@ -1,7 +1,8 @@
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 }
diff --git a/hw4/public/index.html b/hw4/public/index.html
index 0cf2a5d..3de35a0 100644
--- a/hw4/public/index.html
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@@ -4,8 +4,31 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Form Exercise</title>
+    <link
+      rel="stylesheet"
+      href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css"
+    />
+    <script defer src="03-form.js"></script>
   </head>
-  <body>
-    <!-- Add your code here -->
-  </body>
+    <body class="bg-dark">
+      <form class="bg-light border rounded w-50 mx-auto mt-5 p-3" method='post' action="/submit">
+        <h1 class="mt-2 mb-4">Contact Form</h1>
+        <h6>Name *</h6>
+        <input type="name" name="name" class="form-control" aria-label="name" id="inputname" aria-describedby="basic-addon1">
+        <h6>Email *</h6>
+        <input type="email" name="email" class="form-control" aria-label="email" id="inputemail" aria-describedby="basic-addon1">
+        <h6>Submit your message:</h6>
+        <textarea type="comment" name="comment" class="form-control" aria-label="msgsubmission" id="inputcomment"></textarea>
+        <div class="form-check">
+          <input class="form-check-input" type="checkbox" name="newsletter" id="newsletterCheckbox" checked>
+          <label class="form-check-label" for="flexCheckChecked">
+            Sign up the newsletter
+          </label>
+        </div>
+
+        <br>
+        <button type="submit" class="btn btn-primary btn-lg btn-block">Submit</button>
+        </div>
+      </form>
+    </body>
 </html>