Hello, I am having trouble with this question. I am using the HP 10bii+ calculator. A step by step instructions on using the calculator, not excel, will help me the most. I know the answer, just not how to get the answer. Thank you!

A firm evaluates all of its projects by applying the IRR rule. A project under consideration has the following cash flows:

Year	Cash Flow
0	$	28,800
1		12,800
2		15,800
3		11,800

If the required return is 13 percent, what is the IRR for this project? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)