I need help with this question

Given the following function definition:

int why(int number) { int result;

if (number > 15) result = number; else if (number % 5 == 0) result = why(number * 2) - 1; else result = why(number + 1) - 2; return result; }

Complete a box trace of the function when the following call is made:

cout << why(2) << endl;

Your trace should be written on the blank paper provided. Identify the trace as BOX TRACE 1. Show all of your work. Be sure to label things appropriately.

The output displayed is

Can you show me the steps on how you got the output?