Oriental Corporation has gathered the following data on a proposed investment project:Investment in depreciable equipment $ 620,000Annual net cash flows $ 86,000Life of the equipment 10 yearsSalvage value $ 0Discount rate 6 %The company uses straight-line depreciation on all equipment. Assume cash flows occur uniformly throughout a year except for the initial investment. The payback period for the investment would be: (Round your answer to 1 decimal place.)