(Payback period, net present value, profitability index, and internal rate of return calculations) You are considering a project with an initial cash outlay of $72,000 and expected cash flows of $23,040 at the end of each year for six years. The discount rate for this project is 9.9 percent. a. What are the project's payback and discounted payback periods? b. What is the project's NPV? c. What is the project's PI? d. What is the project's IRR?