(Payback period, NPV, PI, and IRR calculations) You are considering a project with an initial cash outlay of $70 comma 000 and expected free cash flows of $26 comma 000 at the end of each year for 6 years. The required rate of return for this project is 6 percent. a. What is the project's payback period? b. What is the project's NPV? c. What is the project's PI? d. What is the project's IRR?