Show the call stack and what is printed or returned by each call for each of the following: 1. factorial(5) where factorial is defined as follows: public static int factorial(int n) { if (n == 0 ) return 1; else return n * factorial(n-1); } 2. mysteryl(321) where mysteryl is defined as follows: Recall that is the remainder operator, so x % 10 returns the right most digit and x / 10 removes the right most digit (since it is integer division). // precondition: x >=0 public static void mysteryl (int x) System.out.print (x $ 10); if ((x / 10) != 0) mysteryi (x / 10); 1 System.out.print (x % 10); 3. mystery2(4) where mystery2 is defined as follows: public static int mystery2(int n) { if (n == 0) return 1; else return 3 * mystery2 in - 1); ) 4. product (4) where product is defined as follows: private static int product (int n) 1 if in