Please explain in as much detail as possible, I'm trying to study for the final and want to understand these questions. Thank you so much

10. Guerilla Radio Broadcasting has a project available with the following cash flows: Year Cash Flow 0 -$17,400 1 7,200 2 8,500 3 2,900 4 2,500 What is the project's payback period? Do not round up to the integer; instead, calculate the payback period with fraction of years