Please help me please

May Corporation Holdings is considering two mutually exclusive projects. The company intends to invest in either one of the projects. May Corporation Holdings' required rate of return is 10 percent. Initial outlay for the investment is $50,000. The annual average profit for projects XY and AB is $25,900 and $13,800 respectively. The cash inflows after tax from both projects are as follows: REQUIRED: (a) Determine for both projects, XY and AB the following: - i) Average Accounting Return (AAR) ii) Payback Period iii) Net Present Value (NPV) iv) Profitability Index