Write a python program that asks the user to enter five test scores. The program will display the average of the test scores and the letter grade for the average. You will have function calculate_average that accepts five test scores as arguments and returns the average of the scores. You will have function determine_grade that accepts the average and returns the letter grade that represents that average

Enter score 1: 90

Enter score 2: 80

Enter score 3: 70

Enter score 4: 60

Enter score 5: 100

The average is 80.0

The grade is B