An investment project costs $10,000 and has annual cash flows of $2,830 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 4 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 21 percent? (Enter 0 if the project never pays back. Round your answer to 2 decimal places, e.g., 32.16.) Discounted payback period years.