For the following set of cash flows, Year 0 1 2. 3 Cash Flow -$6,700 4,400 3,900 6,800 Required: (a)What is the NPV at a discount rate of O percent? (Click to select) (b)What is the NPV at a discount rate of 12 percent? (Click to select) (c) What is the NPV at a discount rate of 23 percent? (Click to select) (d)What is the NPV at a discount rate of 28 percent? (Click to select)