8.8.c

#include <stdio.h>

#define NUM_STUDENTS 5
#define NUM_QUIZZES 5

int main(void)
{
    int grades[NUM_STUDENTS][NUM_QUIZZES];
    int high, low, quiz, student, total;

    for (int student = 0; student < NUM_STUDENTS; student++)
    {
        printf("Enter your grades for student %d: ", student + 1);
        for (quiz = 0; quiz < NUM_QUIZZES; quiz++)
        {
            scanf("%d", &grades[student][quiz]);
        }
    }

    printf("\nStudent Total Average\n");
    for (student = 0; student < NUM_STUDENTS; student++)
    {
        printf("%4d      ", student + 1);
        total = 0;
        for (quiz = 0; quiz < NUM_QUIZZES; quiz++)
        {
            total += grades[student][quiz];
        }
        printf("%3d     %3d\n", total, total / NUM_QUIZZES);
    }

    printf("\nQuiz    Average  High  Low\n");
    for (quiz = 0; quiz < NUM_QUIZZES; quiz++)
    {
        printf("%3d     ", quiz + 1);
        total = 0;
        high = 0;
        low = 100;
        for (student = 0; student < NUM_STUDENTS; student ++)
        {
            total += grades[student][quiz];
            if (grades[student][quiz] > high)
                high = grades[student][quiz];
            if (grades[student][quiz] < low)
                low = grades[student][quiz];
        }
        printf("%3d    %3d   %3d\n", total / NUM_STUDENTS, high, low);
    }

    return 0;
}