Mark bought equipment on 1/2/18 for 18000 the equipment is expected to remain in service for 4 years and operate for 3750 hours at the end of its useful life it will have a residual value of 3000 the equipment operates for 375 hours the first year and 1125 hours the second year 1500 hours the third and 750 hours the fourth year prepare a schedule of deprecation expense accumulated deprecation and book value per year for the equipment under 3 depreciation methods straight line units of production and double declining