Apex Fitness Club uses straight-line depreciation for a machine costing $24,650, with an estimated four year life and a $2,450 salvage value. At the beginning of the third year, Apex determines that the machine has three more years of remaining useful life, after which it will have an estimated $2,000 salvage value. Required . Compute the machine's book value at the end of its second year. 2. Compute the amount of depreciation for each of the final three years given the revised estimates