For the following set of cash flows. Year Cash Flow -$6,500 6,400 T 1 2 6,900 3 6,900 a. What is the NPV at a discount rate of 0 percent? NPV b. What is the NPV at a discount rate of 14 percent? NPV c. What is the NPV at a discount rate of 17 percent? NPV d. What is the NPV at a discount rate of 22 percent? NPV