An investment project has annual cash inflows of $4,400, $4,900, $5,400, and $6,400, and a discount rate of 12 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 $7,000? Discounted payback period years b. What is the discounted payback period for these cash flows if the initial cost is $8,500? Discounted payback period years c. What is the discounted payback period for these cash flows if the initial cost is $13,000? Discounted payback period years