Question 20

Consider the following function:

public static int mystery(int n) {

return (n-1)* mystery(n-2);

}

a) Explain why this program has infinite recursion.

b) What information would you need to implement this function correctly?

Question 21

Consider the following function:

public static void int mystery3(int n){ if (n = 0) return 0; else return n + mystery3(n-1) }

What is the output mystery3(5)?

Question 21 options:

	0
	5
	10
	15