1. School XYZ has decided to implement a digital record of their students marks and grades for all their test and examination. Their headmaster has submitted a grade specification below for you to design a system.

Marks and Grades

Marks	Grade
80-100	A
70-79	B
60-69	C
50-59	D
40-49	E
0-39	F

You are also required to include the following items into the program:

1. Use array to store list of students mark and array size is equal to the number of students.
2. Use for loop where applicable.