solve with no ecxel please.

5. Consider the following two mutually exclusive projects (the required return on both projects is 12*6) (21+3+6=30 Points) Show each stop of your work: you can lase the raore aoove jor simpucury. a. Calculate Payback period, NPV and Profitability index and show which project would you choose based cach of the methods? b. What would be your final decision and why? Mention three advantages of NPV compared to the other investment decision criteria