What is the payback period on the proposed phone app for a favorite sports team? The estimated cash flows appear below. (note: payback is in years; round to 2 decimals) Year 0 cash flow = -90,000 Year 1 cash flow = -19,000 Year 2 cash flow = 52,000 Year 3 cash flow = 49,000 Year 4 cash flow = 54,000 Year 5 cash flow = 47,000 Year 6 cash flow = 55,000