An investment project costs $10,000 and has annual cash flows of $3,000 for six years. What is the discounted payback period if the discount rate is zero percent? (Enter 0 if the project never pays back. Round your answer to 2 decimal places. (e.g., 32.16)) Discounted payback period years What is the discounted payback period if the discount rate is 6 percent? (Enter 0 if the project never pays back. Round your answer to 2 decimal places. (e.g., 32.16)) Discounted payback period years What is the discounted payback period if the discount rate is 20 percent?