Using Structures in C, write an interactive program to display the mark-sheet and grade card for 10 students for a MOOC course.  Note: Assumptions can be made wherever necessary and mention them.

To solve the problem of generating a marksheet and grade card for 10 students of a MOOC course using structures in C, we will proceed step-by-step.

Assumptions:

1. The course has 3 subjects.
2. Marks for each subject are entered as integers.
3. The total marks for each student will be calculated as the sum of marks across all subjects.
4. The grade is based on the total marks, with the following grading system:
   • 90 and above: Grade A
   • 75 to 89: Grade B
   • 60 to 74: Grade C
   • 50 to 59: Grade D
   • Below 50: Grade F
5. The student’s name, roll number, and marks for each subject will be input interactively.

Approach:

1. We will define a structure to store the details of each student.
2. For each student, we will store their name, roll number, and marks in 3 subjects.
3. We will calculate the total marks and assign the grade.
4. We will display the result for each student in a formatted manner.

Structure Definition:

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