Answer from cs61c-ck (Allen Lee 16583554) for Question 2
#include <stdio.h>
void setTo5(int *ptr);

int main() {
    int n = 27;
    setTo5 (&n);
    printf("n = %d\n", n);
    return 0;
}

void setTo5(int *ptr) {
  *ptr = 5;
}