18. An investment has two Internal Rates of Return, 15% and 28%. The investment has a negative NPV when a required return of 22% is used. Given that, is the NPV of the investment positive or negative when the required return is: a. 12% b. 16% c. 26% d. 30% 19. Investment B's IRR is 22%. Investment A 's IRR is 32%. The NPV of A and B is the same when the required return is 15%. Which investment do you choose when the required return is: a. 19% b. 29% c. 35%