Major Corp. is considering the purchase of a new machine for $5,000 that will have an estimated useful life of five years and no salvage value. The machine will increase Major's after-tax cash flow by $2,000 annually for five years. Major uses the straight-line method of depreciation and has an incremental borrowing rate of 10%. The present value factors for 10% are as follows:Ordinary annuity with five payments 3.79Annuity due for five payments 4.17Using the payback method, how many years will it take to pay back Major's initial investment in the machine?