Please show work in Excel

The management of Unter Corporation, an architectural design firm, is considering an investment with the following cash flows: Year Investment $78,000 $5,000 1 2 3 4 5 6 7 8 9 10 Cash Inflow $5,000 $10,000 $12,000 $15,000 $18,000 $16,000 $14,000 $12,000 $11,000 $11,000 Required: 1. Determine the payback period of the investment. (Round your answer to 1 decimal place.) Payback period years 2. Would the payback period be affected if the cash inflow in the last year were several times as large? O Yes O No