An investment project costs $21,000 and has annual cash flows of $4,000 for six years. a. What is the discounted payback period if the discount rate is zero percent? b. What is the discounted payback period if the discount rate is 3 percent? c. What is the discounted payback period if the discount rate is 21 percent? What is the payback period for the following set of cash flows? Multiple Choice 1.94 years 1.85 years 1.80 years 2.15 years 1.87 years