Use an array to store the grades. Use a looping structure to populate the array. Calculate the numeric average based upon the 4 equally-weighted numeric grades. Display each of the 4 numeric grades from the array on the screen using a looping structure. Display the numeric average. Create a function that will convert the numeric average to a letter grade average using the grading scale: A = 90 to100 B = 80 to 89 C = 70 to 79 D = 60 to 69 F = Below 59 The function must return the value of the letter grade average. Display the letter grade average. Include comments At the top of the program to include: Your name Class name and number Instructor name Overall Description of program Comment each section of code Describe what the section accomplishes'