Answer from cs61c-el (David Tung 16479725) for Question 2
# include <stdio.h>

void setTo5(int *);

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

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