Depreciation by two methods A Kubota tractor acquired on January 8 at a cost of $90,000 has an estimated useful life of 10 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. First Year Second Year