An investment project has annual cash inflows of $3,400,$4,300,$5,500, and $4,700, for the next four years, respectively. The discount rate is 13 percent. a. What is the discounted payback period for these cash flows if the initial cost is $6,100 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. What is the discounted payback period for these cash flows if the initial cost is $8,200 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. What is the discounted payback period for these cash flows if the initial cost is $11,200 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)