Grayson Company is considering a purchase of equipment that costs $51,000 and is expected to offer annual cash inflows of $14,000. Grayson's minimum required rate of return is 10% How many years must the cash flows last for the investment to be acceptable? (PV of S1 and PVA OLD (Use appropriate factor(s) from the tables provided. Do not round your intermediate calculations. Round to the nearest whole year) Multiple Choice:
a. 6 years b.3 years c.5 years d.4 years