An investment project has annual cash inflows of $5,100,$3,200,$4,400, and $3,600, for the next four years, respectively. The discount rate is 15 percent. What is the discounted payback period for these cash flows if the initial cost is $5,000 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) What is the discounted payback period for these cash flows if the initial cost is $7,100 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) What is the discounted payback period for these cash flows if the initial cost is $10,100? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)