Weber Drilling Company is considering investing $20M 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). If the ROR is 13% is it a justifiable investment based on the established MARR