Please, be as specific as possible. Dont ise excel for the calculations. Thank you

6) Tangshan Mining Company is considering investing in a new mining project. The firm's cost of capital is 12 percent and the project is expected to have an initial after tax cost of $5,000,000. Furthermore, the project is expected to provide after-tax operating cash flows of $2,500,000 in year 1,$2,300,000 in year 2,$2,200,000 in year 3 and ($1,300,000) in year 4? (a) Calculate the project's NPV. (b) Calculate the project's IRR. (c) Should the firm make the investment