Please help with these.

You are considering two mutually exclusive projects with the following cash flows. Which project(s) should you accept if the discount rate is 8.5 percent - Use NPV criteria? What if the discount rate is 13 percent? Based on the profitability index rule, should a project with the following cash flows be accepted if the discount is 14 percent? Why or why not? Consider the following two mutually exclusive projects: Calculate NPV and IRR. The required return is 15 percent for both projects. You are analyzing a project and have gathered the following data: Required payback period 2.5 years Required return 14.5 percent Should you accept this project? Why