diff --git a/answer-1.py b/answer-1.py
new file mode 100644
index 0000000..377842c
--- /dev/null
+++ b/answer-1.py
@@ -0,0 +1,28 @@
+
+row_number = 0
+
+def print_pascal_triangle(n):
+    ''' A recursive function to print the first n rows of Pascal triangle.
+    
+    Returns the the nth row as a list of integers. '''
+    
+    # initialize the row as a list of 1s of size n.
+    row = [1] * n
+    
+    # The base condition of the recursion, when n is 1.
+    if n == 0:
+        return [1]
+    else:
+        previous_row = print_pascal_triangle(n - 1)
+        
+        # calculate the row valuse except the first and last values as they are always 1.
+        for i in range(1, n - 1):
+            row[i] = previous_row[i-1] + previous_row[i]
+            
+        # print the current row.
+        print(" " * (row_number - n), end="")   # padding
+        print(row)
+        return row
+
+row_number = int(input('Enter the numbers of rows from Pascal triangle you want to print: '))
+print_pascal_triangle(row_number)
diff --git a/answer-2.py b/answer-2.py
new file mode 100644
index 0000000..5b864e7
--- /dev/null
+++ b/answer-2.py
@@ -0,0 +1,15 @@
+
+# Allow the user to input the sequence.
+input_sequence  = input("Enter the input sequence as words seperated by a hyphen: ")
+
+# Make a list of the words in the input sequence.
+list_sequence = input_sequence.split("-")
+
+# Sort the words in the list.
+list_sequence.sort()
+
+# Join the words in the list with a hyphen.
+output_sequence = "-".join(list_sequence)
+
+# Print the output sequence.
+print(output_sequence)
diff --git a/answer-3.py b/answer-3.py
new file mode 100644
index 0000000..b0bd410
--- /dev/null
+++ b/answer-3.py
@@ -0,0 +1,30 @@
+
+def is_perfect_number(number):
+    ''' A function to check if a number is a perfect number.
+    
+    Returns True or False. '''
+    
+    # If the number is negative or 0, return False.
+    if number <= 0:
+        return False
+    
+    # Calculating the divisors of the number.
+    divisors = [1]
+    for i in range(2, number):
+        if number % i == 0:
+            divisors.append(i)
+
+    # Calculating the sum of the divisors and checking if the number is equal to the sum of its divisors.
+    sum_of_divisors = sum(divisors)
+    if number == sum_of_divisors:
+        return True
+    else:
+        return False
+        
+
+number = int(input("Enter a number to check if it's a perect number: "))
+
+if is_perfect_number(number):
+    print (f"Number {number} is a perfect number")
+else:
+    print (f"Number {number} is NOT a perfect number")
\ No newline at end of file
diff --git a/answer-4/GUI.py b/answer-4/GUI.py
new file mode 100644
index 0000000..da2ec0e
--- /dev/null
+++ b/answer-4/GUI.py
@@ -0,0 +1,65 @@
+
+import password_generator
+import tkinter as tk
+import os
+
+current_path = os.path.dirname(os.path.realpath(__file__))
+
+def generate_btn_handler():
+    """ A function to handle the press event of the generate button """
+    
+    # Getting the values entered by the user
+    lower_case_letters = int(lower_case_entry.get())
+    upper_case_letters = int(upper_case_entry.get())
+    numbers = int(numbers_entry.get())
+    special_chars = int(special_chars_entry.get())
+    
+    # Creating the password from the values entered by the user using the password_generator module from password_generator.py
+    password = password_generator.Generate_random_password(lower_case_letters, upper_case_letters, numbers, special_chars)
+    
+    # Clearing the password field and displaying the generated password
+    password_field.config(state="normal")
+    password_field.delete(0, tk.END)
+    password_field.insert(0, password)
+    password_field.config(state="readonly")
+    
+
+# Creating the main window
+screen = tk.Tk()
+screen.title("Password Generator")
+canvas = tk.Canvas(screen, width=500, height=450)
+canvas.pack()
+
+# Displaying the logo image
+logo = tk.PhotoImage(file = current_path + "\psw.png")
+logo = logo.subsample(3, 3)
+canvas.create_image(250, 90, image = logo)
+canvas.create_text(250, 200, text = "How would you like your password?", font=("Arial", 17, "bold"), fill= "#556080")
+
+canvas.create_text(250, 250, text = "Lower-case Letters: ", font = ("Arial", 11, "bold"), anchor="e", fill= "#556080")
+canvas.create_text(250, 270, text = "Upper-case Letters: ", font = ("Arial", 11, "bold"), anchor="e", fill= "#556080")
+canvas.create_text(250, 290, text = "Numbers: ", font = ("Arial", 11, "bold"), anchor="e", fill= "#556080")
+canvas.create_text(250, 310, text = "Special Characters: ", font = ("Arial", 11, "bold"), anchor="e", fill= "#556080")
+
+# Entry boxes for the password generation options with default values of 3
+lower_case_entry, upper_case_entry, numbers_entry, special_chars_entry  = tk.Entry(screen), tk.Entry(screen), tk.Entry(screen), tk.Entry(screen)
+lower_case_entry.insert(0, 3)
+canvas.create_window(250, 250, window = lower_case_entry, anchor="w")
+upper_case_entry.insert(0, 3)
+canvas.create_window(250, 270, window = upper_case_entry, anchor="w")
+numbers_entry.insert(0, 3)
+canvas.create_window(250, 290, window = numbers_entry, anchor="w")
+special_chars_entry.insert(0, 3)
+canvas.create_window(250, 310, window = special_chars_entry, anchor="w")
+
+# Create the generate button handler function and assignment to it to gen
+generate_btn = tk.Button(screen, text = "Generate Password", command = generate_btn_handler, relief="groove")
+generate_btn.config(fg="#556080", font=("Arial", 15))
+canvas.create_window(250, 350, window = generate_btn)
+
+# creating the password field to display the generated password
+password_field = tk.Entry(screen, font=("Arial", 20, "bold"), fg="#e4c05c", justify="center", relief="flat", state="readonly")
+canvas.create_window(250, 400, window = password_field)
+
+screen.mainloop()
+
diff --git a/answer-4/password_generator.py b/answer-4/password_generator.py
new file mode 100644
index 0000000..406319a
--- /dev/null
+++ b/answer-4/password_generator.py
@@ -0,0 +1,37 @@
+
+import random
+
+SPECIAL_CHARS = """ !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~"""
+NUMBERS = "0123456789"
+UPPER_LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+LOWER_LETTERS = "abcdefghijklmnopqrstuvwxyz"
+
+
+def Generate_random_password(number_of_lower_case_letters = 0, number_of_upper_case_letters = 0, number_of_numbers = 0, number_of_special_chars = 0):
+    """ A function to generate a random password.
+    
+    Accepts the number of upper-case letters, lower-casw letters, digits and special characters.
+    
+    Returns the password as a string."""
+    
+    # Initialize a list to store the password characters.
+    password_elements = []    
+    
+    # Adding the password characters to the list.
+    for i in range(number_of_lower_case_letters):
+        password_elements.append(random.choice(LOWER_LETTERS))
+    for i in range(number_of_upper_case_letters):
+        password_elements.append(random.choice(UPPER_LETTERS))
+    for i in range(number_of_numbers):
+        password_elements.append(random.choice(NUMBERS))
+    for i in range(number_of_special_chars):
+        password_elements.append(random.choice(SPECIAL_CHARS))
+    
+    # Shuffle the elements of the list.
+    random.shuffle(password_elements)
+    
+    # Convert the list to a string and return the final password string.
+    password = ''.join(password_elements)
+    return password
+
+    
\ No newline at end of file
diff --git a/answer-4/psw.png b/answer-4/psw.png
new file mode 100644
index 0000000..e44f6f9
Binary files /dev/null and b/answer-4/psw.png differ
diff --git a/bonus.ipynb b/bonus.ipynb
new file mode 100644
index 0000000..7bb614a
--- /dev/null
+++ b/bonus.ipynb
@@ -0,0 +1,99 @@
+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Write a Python program to sort a list of dictionaries using Lambda. Original list of dictionaries : [{'make': 'Nokia', 'model': 216, 'color': 'Black'}, {'make': 'Mi Max', 'model': '2', 'color': 'Gold'}, {'make': 'Samsung', 'model': 7, 'color': 'Blue'}]\n",
+    "\n",
+    "Sorting the List of dictionaries : [{'make': 'Nokia', 'model': 216, 'color': 'Black'}, {'make': 'Samsung', 'model': 7, 'color': 'Blue'}, {'make': 'Mi Max', 'model': '2', 'color': 'Gold'}]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[{'make': 'Nokia', 'model': 216, 'color': 'Black'}, {'make': 'Samsung', 'model': 7, 'color': 'Blue'}, {'make': 'Mi Max', 'model': '2', 'color': 'Gold'}]\n"
+     ]
+    }
+   ],
+   "source": [
+    "input_list = [{'make': 'Nokia', 'model': 216, 'color': 'Black'}, {'make': 'Mi Max', 'model': '2', 'color': 'Gold'}, {'make': 'Samsung', 'model': 7, 'color': 'Blue'}]\n",
+    "\n",
+    "output_list = sorted(input_list, key = lambda x: int(x['model']), reverse = True)\n",
+    "\n",
+    "print(output_list)\n"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Write a Python program to filter a list of integers using Lambda.\n",
+    "\n",
+    "Original list of integers: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
+    "\n",
+    "Even numbers from the said list: [2, 4, 6, 8, 10]\n",
+    "\n",
+    "Odd numbers from the said list: [1, 3, 5, 7, 9]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[2, 4, 6, 8, 10]\n",
+      "[1, 3, 5, 7, 9]\n"
+     ]
+    }
+   ],
+   "source": [
+    "original_list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
+    "even_numbers = list(filter(lambda x: x % 2 == 0, original_list))\n",
+    "odd_numbers = list(filter(lambda x: x % 2!= 0, original_list))\n",
+    "\n",
+    "print(even_numbers)\n",
+    "print(odd_numbers)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.9"
+  },
+  "orig_nbformat": 4,
+  "vscode": {
+   "interpreter": {
+    "hash": "2797e5e3c6ba5d7debb5cc5ee17065306a7394527f15851b12060374d87054f5"
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}