please explain how to get the answer. the right answer is there

Correct Answer - 16,832.241 margin of error +/- 1 Question 2 0/25 pts If a project that costs 204,000 dollars initially, and returns 70,000 each year for the next 4 years, what is the present value annuity factor that you would look up in order to estimate the IRR? You Answered Correct Answer 2.9143 margin of error +/- 1 Question 3 25/25 pts If a project that costs 244,000 dollars initially, and returns 51,000 each year for the next 4 years, what is the payback period in years