An investment project has annual cash inflows of $5,400,$5,900,$6,400, and $7,400, and a discount rate of 17 percent. (Do not round intermediate calculations. Round the final answers to 2 decimal places.) a. What is the discounted payback period for these cash flows if the initial cost is $7,500 ? Discounted payback period years b. What is the discounted payback period for these cash flows if the initial cost is $10,000 ? Discounted payback period years c. What is the discounted payback period for these cash flows if the initial cost is $15,000 ? Discounted payback period years