Computer equipment was acquired at the beginning of the year at a cost of $80,000 that has an estimated residual value of $2500 and an estimate useful life of 5 years. Part 1. Determine the annual straight-line depreciation and the net book value for year 3. Part 2. Determine the depreciation rate (per unit depreciation) and the depreciation expense for this year under Units of Production if the equipment will last for 10,000 hours and it was used for 1,200 hours. Part 3. Determine the depreciation expense for year 2 and the Accumulated depreciation for year 2 using the double declining balance depreciation method