4. Which of the following statements is INCORRECT? a. An NPV profile graph shows how a project's NPV varies as the cost of capital changes. Both NPV and IRR will not lead to conflicting decisions as long as the WACC is greater than the crossover rate and the projects are mutually exclusive. c. IRR is the interest rate that forces the present value of the cash inflows equal cost, and the NPV=0. d. We must know the exact cost of capital to draw a particular project's NPV profile. e. c and d are incorrect