Hayden Company is considering the acquisition of a machine that costs $347,000. The machine is expected to have a useful life of 6 years, a negligible residual value, an annual net cash flow of $87,000, and annual operating income of $73,950.What is the estimated cash payback period for the machine (round to one decimal points)? 5.9 years 4.0 years 4.7 years 0 1.2 years