An investment project has annual cash inflows of $3,600, $4,500, $5,700, and $4.900, for the next four years, respectively. The discount rate is 15 percent. a. What is the discounted payback period for these cash flows if the initial cost is $6 300? (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 $8,4007 (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 $11,4007 (Do not round intermediate calculations and round your answer to 2 decimal places, eg.. 32.16.) years a. Discounted payback period b. Discounted payback period c. Discounted payback period years years