. please show the answer in detail with out using excel.

Use the following information to answer questions 11-15: A firm evaluates a project with the following cash flows. The firm has a 2 year payback period criteria and a required return of 12 percent. Year Cash flow (OMR) -26,000 18,000 2 10,000 7,000 4 - 15,000 5 9,000 0 1 3 11. What is the net present value for the project? 12. What is the payback period for the project? 13. What is the discounted payback period for the project? 14. What is the profitability index for the project? 15. Given your analysis, should the firm accept or reject the project