Juniper Corporation is considering two alternative investment proposath the following data: Proposal Y $465.000 8 years Investment Useful life Estimated annual net cash inflows for 8 years Residual value Depreciation method Required rate of return Proposal X $870.000 8 years $140,000 $14,000 Straight-line 134 574,000 $ Straight-line 6% How long is the payback period for Proposal X? O 6.21 years 6.28 years 2.14 years 11.76 years