An investment project has annual cash inflows of $4,600,$3,700,$4,900, and $4,100, 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 $5,500 ? (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 $7,600 ? (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 $10,600 ? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)