ZZZ Best (ZZZ) is considering two mutually exclusive projects with the annual cash flows shown below. What is the IRR of each project? IRR of A__IRR of B__ If ZZZ's required rate of return for these projects is 8% which project should it choose based on NPU? Which project should if choose if the required rate of return is 18% based on NPV? At what required rate of return should it be indifferent to the choice of projects based solely on their NPV? What is the Discount rate above which neither project should be accepted