Answer from cs61c-cg (Daniel Lau 16776873) for Question 2
#include <stdio.h>
void setTo5(int* );


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

void setTo5(int* a)
{
   *a =5;
   return 0;
}