• Task 4 (10 points)
  • Write a Python program to accept a filename from the user and print the extension of that.
• Task 5 (10 points)
  • Write a Python program to calculate the length of a string.
• Task 6 (15 points)
  • Write a Python program to get a string made of the first 2 and the last 2 chars from a given a string. If the string length is less than 2, return instead of the empty string.
    • Example: 'cybersecurity' > Expected Result: 'cyty'