6. A project has the following after-tax total (or net) cash flows. Year After-tax total (or net) cash flow 1234 $500,000 2 600,000 800,000 4 1,000,000 The required rate of return on the project is 13 percent. The initial investment (or initial cost or initial outlay) of the project is $1,500,000. a) Find the net present value (NPV) of the project. b) Find the profitability index (PI) of the project. c) Calculate the modified internal rate of return (MIRR) of the project.