1. Assume that a new tractor is purchased on January 1 for $160,000 and given a salvage value of $40,000 and a useful life of 8 years. What would the annual depreciation be for the first 2 years under each depreciation method? 2. For the previous problem, what would the tractors book value be at the end of Year 2 under each depreciation method? 3. Rework the answers to question 1 assuming the purchase date was May 1