Hi, This is a Python program question.

a) [10 pts] Write a Python program that accepts a list of marks then prints the letter grade and description according to the Grading System of the Chang School of Continuing Education. For example, if the user enters 90, 120, 12, 71.5, 62. 5 , the output would be as follows: Mark Letter Grade Performance Description 90 A+ Excellent 120 Not Possible Not Possible 12 Not Possible Not Possible 71.5 B- Good 62.5 C Satisfactory [1=| b) [10 pts] Write a code to compute and print the sum of squares of only the Excellent marks. Forexample,ifthe userenters 90.5, 120, -12, 71.3, 82.2, 62.5,then the output should be: The Excellent marks are: [90.5, 82.2] The sum of squares is 14947.09 c) [10 pts] Write a code to compute and print the Median , Ave rage and Mode of the marks between 0 and 100 (inclusively) after rounding each mark to the nearest integer. Ensure notifying the user if there is no unique mode found, as the Mode in this exercise returns only the single most common mark in the list