Just need the answer for c and d

Piercy, LLC, has identified the following two mutually exclusive projects: Year NM Cash Flow (A) Cash Flow (B) -$52,000 -$52,000 28,000 15,800 22,000 19,800 17,000 24,000 12,400 25,800 a-1. What is the IRR for each of these projects? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) a-2. If you apply the IRR decision rule, which project should the company accept? b-1. Assume the required return is 11 percent. What is the NPV for each of these projects? (Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.) b-2. Which project will you choose of you apply the NPV decision rule? C-1. Over what range of discount rates would you choose Project A? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) c-2. Over what range of discount rates would you choose Project B? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) At what discount rate would you be indifferent between these two projects? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)