5. A project has the following after-tax total (or net) cash flows. Year After-tax total (or net) cash flow 1 $100,000 2 120,000 3 150,000 4 200,000 The required rate of return on the project is 15 percent. The initial investment (or initial cost or initial outlay) of the project is $320,000. a) Find the (regular) payback period of the project. b) Compute the discounted payback period of the project.