Your friend needs help with their homework. They need to compute the payback period on a proposed capital budgeting project - - a new wind turbine. The expected cash flows appear below. Your friend is not sure whether they must use the required rate of return of 21.5% in computing the answer. What is the payback period? Your friend in counting on you. (Answer in years, rounding to 2 decimals) Year 0 cash flow =156,000 Year 1 cash flow =25,000 Year 2 cash flow =25,000 Year 3 cash flow =25,000 Year 4 cash flow =25,000 Year 5 cash flow =25,000 Year 6 , cash flow =25,000 Year 7 cash flow =25,000 Year 8 cash flow =25,000