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Depreciation by Two Methods A storage tank acquired at the beginning of the fiscal year at a cost of $90,000 has an estimated residual value of $12,000 and an estimated useful life of 25 years. a. Determine the amount of annual depreciation by the straight-line method. b. Determine the amount of depreciation for the first and second years computed by the double declining-balance method. Depreclation Year 1 Year 2