Problem 1.
num1 = 3, num2 = 2
result = 0
i = 1, j = 1, result = 3
i = 1, j = 2, result = 6
i = 2, j = 1, result = 9
i = 2, j = 2, result = 12
i = 3, j = 1, result = 15
i = 3, j = 2, result = 18
Output: 18

In general, the body of the inner loop executes num1*num2 times.
Therefore, when program1(25, 20) is called, the body of the inner
loop is executed 500 times. The variable result starts off at 0 and
increases by 3 with each execution and therefore reaches 1500
when the function ends.
-------------------------------
Problem 2.
result = 0, n = 16
result = 2, n = 8
result = 4, n = 4
result = 6, n = 2
result = 8, n = 1
Output: 8
-------------------------------
Problem 3.
test3						test3helper
n = 3
		----- 4 ----->			n = 4
						temp = 16
						Output: 4
						Output: 16
		<---- 20 -----
temp = 20
Output: 3
Output: 20
n = 1
		---- 2 ---->			n = 2
						temp = 4
						Output: 2
						Output: 4
		<--- 8 ----
temp = 8
Output: 1
Output: 8
n = -1

So the output is
4
16
3
20
2
4
1
8