21. Which of the following statements is CORRECT? Assume that the project being considered has normal cash flows, with one outflow followed by a series of inflows. a. The lower the cost of capital used to calculate a project's NPV, the lower the calculated NPV will be. b. If a project's NPV is less than zero, then its IRR must be less than the cost of capital. c. If a project's NPV is greater than zero, then its IRR must be less than zero. d. The NPV of a relatively low-risk project should be found using a relatively high cost of capital. e. A project's NPV is found by compounding the cash inflows at the IRR to find the terminal value (TV), then discounting the TV at the cost of capital