How to solve Q19-21?

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A: Before-Tax Market Value B: Annual Depreciation C: Book Value D: Recaptured Depreciation E: Taxes Payable or Tax Savings on Recaptured Depreciation F: After-Tax Market Value Column A less Column E G: After-Tax Capital Recovery H: Tax Savings due to Depreciation Charges l: Before-Tax Operating Expenses J: After-Tax Operating Expenses K: Annual Cost for year "n" L: After-Tax EAC if defender is kept "n'' years. Table 3 After-Tax Analysis of the Defender EOY A 0 80,000 15,000 CC 18,000 FF 1 64,000 12,000 AA BB DD 51,200 9,600 3 40,960 7,680 LGG 25,920 KK 4 32,768 62144 5 214 4,915 31,104 6 20,972 3,932 37,325 After-Tax MARR 8% Income Tax Rate 40% A: Before-Tax Market Value B: Annual Depreciation C: Book Value D: Recaptured Depreciation E: Taxes Payable or Tax Savings on Recaptured Depreciation F: After-Tax Market Value Column A less Column E G: After-Tax Capital Recovery H: Tax Savings due to Depreciation Charges l: Before-Tax Operating Expenses J: After-Tax Operating Expenses K: Annual Cost for year "n" L: After-Tax EAC if defender is kept "n'' years. Table 3 After-Tax Analysis of the Defender EOY A 0 80,000 15,000 CC 18,000 FF 1 64,000 12,000 AA BB DD 51,200 9,600 3 40,960 7,680 LGG 25,920 KK 4 32,768 62144 5 214 4,915 31,104 6 20,972 3,932 37,325 After-Tax MARR 8% Income Tax Rate 40%