Calculate step by step (Using formula)

As a graduate accountant, you are asked by your manager to evaluate two investment projects. Both projects concern the purchase of new machinery. The follow data are available for each project. Assume the required rate of return for both projects are 15%, and straight-line depreciation is used. a. Calculate Accounting Rate of Return for both projects. b. Calculate the payback period for both projects. c. Calculate the NPV for both projects. d. Based on your answers to part (c), should we accept any of these two projects? Why