Estimated cash flows appear below for an investment project. The project's required rate of return (RRR) is 11.40%. What is the discounted payback period for the project in years? Cash flows after Year 0 are assumed to be end-of-year cash flows. Year 0 cash flow = -67,000 Year 1 cash flow = 17,000 Year 2 cash flow = 20,000 Year 3 cash flow = 27,000 Year 4 cash flow = 30,000 Year 5 cash flow = 24,000 Select one: a. 3.37 b. 3.83 c. 4.09 d. 3.06 e. 2.87 f. 3.25