Arrays - General Questions

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int a[5] = {5, 3, 9, 1, 7}, i, max = a[0];
    for (i = 1; i < 5; i++) if (a[i] > max) max = a[i];
    printf("%d\n", max);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int a[3][4];
    printf("%zu\n", sizeof(a) / sizeof(a[0]));
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int a[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
    printf("%d %d\n", a[1][2], a[2][0]);
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int a[5] = {1, 2, 3};
    int i, s = 0;
    for (i = 0; i < 5; i++) s += a[i];
    printf("%d\n", s);
    return 0;
}

How are the elements of a 2-D array stored in C?