Please help answer a-d in excel format. thank you

The Campbell Company is considering purchasing a spectrometer for the R\&D department. The base price is $140,000, and it would cost another $30,000 to modify the equipment for special use by the firm. The equipment falls into the MARCRS 3-year class and would be sold after 3 years for $60,000. The applicable depreciation rates are 33%,45%,15%, and 7%. The equipment would require an $8,000 increase in net operating working capital (spare parts inventory) at t=0. The equipment would have no effect on revenues, but it should save the firm $50,000 per year in before-tax labor cost. The firms' marginal federal-plus-state tax rate is 35%. a. What is the Year- 0(t=0) net cash flow (initial investment outlay)? b. What are the net operating cash flows in Years 1,2 and 3? c. What is the additional Year-3 cash flow (i.e., the after-tax salvage value of the equipment and the return of working capital)? d. If the project's cost of capital is 9%, should the spectrometer be purchased? Explain