A project has a required return of 12% and a 6-year life. Which of the following statement(s) is(are) correct? Oa. When the project's IRR is greater than 12%, NPV will be greater than zero b. When the project's IRR is less than 12%, NPV will be less than zero c. When the present value of future cash flows equals the initial investment amount. NPV equals zero d. All of the above statements are correct