Answer from cs61c-ac (U alias Vitoria Lok 16597715) for Question 2
#include <stdio.h>

  void setTo5 (int * p);

  int main ( ) {
      int n = 27;
      setTo5 (&n);
      printf ("n = %d\n", n);  /* should print n = 5 */
      return 0;
  }

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