Your firm has estimated the following cash flows for a capital investment project. The firm's required rate of return is 10%. What is the payback period for the project? Cash Flow -$165,000 at time o 49,000 at year 1 49,000 at year 2 43,000 at year 3 43,000 at year 4 37,000 at year 5 25,000 at year 6 2.5 years 4.5 years 4.0 years 3.5 years O 3.0 years