- 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' - Task 7 (15 points) - Write a Python function to multiply all the numbers in a list