Depreciation by Two Methods A Kubota tractor acquired on January 8 at a cost of $36,000 has an estimated useful life of ten years. Assuming that it will have no residual value. a. Determine the depreciation for each of the first two years by the straight-line method. First Year Second Year b. Determine the depreciation for each of the first two years by the double-declining-balance method. Do not round the double-declining balance rate. If required, round your final answer to the nearest dollar. First Year Second Year $ Depreciation by Units-of-activity Method A diesel-powered tractor with a cost of $153,600 and estimated residual value of $5,400 is expected to have a useful operating life of 78,000 hours. During April, the tractor was operated 100 hours. Determine the depreciation for the month. If required, carry out any division to two decimal places. $