An investment project has annual cash inflows of $4,700, $3,600, $4,800, and $4,000, and a discount rate of 14 percent. a. What is the discounted payback period for these cash flows if the initial cost is $5,400? (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 $7,500? (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 $10,500? (Do not round intermediate calculations and round your answer to 2 decimal places, e. g., 32.16.)