ch 8- #7 please help!! cant figure out parts C and D.

The required return on these investments is 13 percent. a. What is the payback period for each project? Note: Do not round intermediate calculations and round your answers to 2 decimal places, e.9., 32.16. b. What is the NPV for each project? Note: Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16. c. What is the IRR for each project? Note: Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32. d. What is the profitability index for each project? Note: Do not round intermediate calculations and round your answers to 3 decimal places, e.g., 32.161. e. Based on your answers in (a) through (d), which project will you finally choose