diff --git a/practice.js b/practice.js
index a9e0f69..2d11e27 100644
--- a/practice.js
+++ b/practice.js
@@ -28,7 +28,9 @@
 */
 
 // Code Here
-
+function first(array,callback){
+  callback(array[0])
+}
 // Do not edit the code below.
 var names = ['Aodhan', 'Greg', 'Jake', 'Oscar', 'Aodhan', 'Tanner', 'Greg'];
 
@@ -48,7 +50,9 @@ first(names, function(firstName){
 */
 
 //Code Here
-
+function last(array,callback){
+  callback(array[array.length-1])
+}
 // Do not edit the code below.
 last(names, function(lastName){
   console.log('The last name in names is ' + lastName);
@@ -66,7 +70,9 @@ last(names, function(lastName){
 */
 
 //Code Here
-
+function multiply(num1,num2,callback){
+    callback(num1*num2)
+}
 // Do not edit the code below.
 multiply(4, 3, function(answer){
   console.log('The answer is ' + answer); //should console.log "The answer is 12"
@@ -85,7 +91,14 @@ multiply(4, 3, function(answer){
 */
 
 //Code Here
-
+function contains(array,name,callback){
+  if(array.includes(name)){
+    callback(true);
+  }
+  else {
+    callback(false);
+  }
+}
 // Do not edit the code below.
 contains(names, 'Oscar', function(result){
   if(result === true){
@@ -106,7 +119,10 @@ contains(names, 'Oscar', function(result){
 */
 
 //Code Here
-
+function uniq(array,callback){
+var duplicate=array.filter((item,index)=>array.indexOf(item)===index)
+callback(duplicate)
+}
 // Do not edit the code below.
 uniq(names, function(uniqArr){
   console.log('The new names array with all the duplicate items removed is ', uniqArr);
@@ -123,7 +139,11 @@ uniq(names, function(uniqArr){
 */
 
 //Code Here
-
+function each(array,callback){
+  for(var a=0;a<array.length;a++){
+    callback(array[a],a)  
+  }
+}
 // Do not edit the code below.
 each(names, function(item, indice){
   console.log('The item in the ' + indice + ' position is ' + item)
@@ -140,7 +160,13 @@ each(names, function(item, indice){
 */
 
 // Code here
-
+function getUserById(array,id,callback){
+  for(var a=0;a<array.length;a++){
+    if (id===array[a].id){
+      return callback(array[a])
+    }
+  }
+}
 // Do not edit the code below.
 var users = [
   {
diff --git a/user.json b/user.json
index 4ac80a0..1fb1116 100644
--- a/user.json
+++ b/user.json
@@ -1,4 +1,4 @@
 {
-  "name": "",
-  "email": ""
+  "name": "Rex Rojo",
+  "email": "rex.rojo@boom.camp"
 }