QUESTION 15 On January 1, a machine with a useful life of 5 years and a 20% salvage value is purchased for $10,000. What is the depreciation expense in year 3 under straight-line depreciation? QUESTION 16 On January 1, a machine with a useful life of 5 years and a 20% salvage value is purchased for $10,000. What is the depreciation expense in year 5 using the double-declining-balance method