Apex Fitness Club uses straight-line depreciation for a machine costing $20,750, with an estimated four-year life and a $2,500 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 $2,050 salvage value. 1. Compute the machines book value at the end of its second year. 2. Compute the amount of depreciation for each of the final three years given