a. What is the Year-0 net cash flow? $ b. What are the net operating cash flows in Years 1, 2, and 3 ? Year 1:$ Year 2:$ Year 3:$ c. What is the additional Year 3 cash flow (i.e, the after-tax salvage and the return of working capital)? $ d. If the project's cost of capital is 12%, what is the NPV of the project? $ Should the machine be purchased