The management of Unter Corporation, an architectural design firm, is considering an investment with the following cash flows:

Year 2 3 4 5 6 7 8 9 10 Required: Investment $31 ,ooo $ 4,000 Cash Inflow $2,000 $4,000 $8,000 $9,000 $12,000 $10,000 $8,000 $6,000 $5,000 $5,000 1. Determine the payback period of the investment. (Round your answer to 1 decimal place.) ayback period years