please answer all questions as they are parts to one question. show work neatly.

Olsen \& Sons Inc. requires 12% return on its investments. The company is considering the following two investment projects: 1) If the company imposes a payback cutoff of three years for its investment projects, should it accept either of the two projects? 2) Which project is better, based on discounted payback period? 3) Which project is better, based on net present value? 4) Which project is better, based on profitability index? 5) Which project is better, based on modified internal rate of return