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? a. The payback period of the project is 3.57 years. (Round to two decimal places.) If the discount rate for this project is 9.8%, the discounted payback period of the project is 3.96 years. (Round to two decimal places.)