The program should read test scores students received on a quiz into an array. 
Assume that scores for up to 30 students could be entered. Input will stop when the sentinel value 
-1 is entered.1

prepare the following four functions:

• One function to read the original scores from the user input into the array

• One function to compute the distribution of scores according to the following scheme, i.e., 
count number of As, Bs, etc.

A: 90 -­- 100 B: 80 -­- 89
C: 70 -­- 79
D: 60 -­- 69
F: 0 -­- 59

This function should not print anything.
One function that computes how many students have the same score. For ex, how many students got 100, how many have 99, how many got a 98, etc. This function should not print anything. 

• One function that displays the number of students, the distribution of scores, and number of students with the same score.

All function parameters for these four functions must be pointers. Your main() should
• Create the array for scores and any other necessary variables or arrays. You do not have to use dynamic allocation for this.

• Use your four functions.

• Should not print anything.