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Drillings R Us is considering investing $25M in a new oil and gas drilling equipment that is expected to have a useful life of four years and is expected to improve the firm's operating costs by $8M/yr. Assume the firm pays a 35% income tax rate on its taxable income and uses the MACRS depreciation method. Determine the after-tax cash flow from the investment in years one through four, with a MARR of 15%, and advise whether this is a justifiable investment (your answer should be done in a tabular format as done in class)