For the following set of cash flows, Year 0 1 2 3 Cash Flow -$8,600 5,500 3,200 6,600 a. What is the NPV at a discount rate of O percent? b. What is the NPV at a discount rate of 13 percent? c. What is the NPV at a discount rate of 22 percent? d. What is the NPV at a discount rate of 27 percent