Captain Marvel Manufacturing is considering two alternative investment proposals with the following data: Proposal x Proposal Y Investment $10,700.000 5580.000 Useful life 5 years 5 years Estimated annual net cash inflows for 5 years $2,140,000 $103.000 Residual value $50.000 $26.000 Depreciation method Straight-line Straight-line Required rate of return 1290 1390 Calculate the payback period for Proposal X. 5 years 4 years 9 years 8 years