XYZ purchased an equipment on 1/8/2015 for $30,000 and $5000 residual value and 8 years useful life or 50,000 working hour. Required: 1. The Accumulated depreciation for the equipment on 31/12/2015 using units of activity if you know that the company operated the equipment 4000 hours in 2015 2. The adjusting entry that must be made on 31/12/2016 using the straight line method. 3. The book value of the equipment on 31/12/2016 if the double declining balance method is used.