Depreciation by Two Methods A storage tank acquired at the beginning of the fiscal year at a cost of $51,000 has an estimated residual value of $9,000 and an estimated useful life of 20 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 methode Depreciation Year 1 Year 2