When originally purchased, a vehicle had an estimated useful life of 12 years The vehicle cost $47,000 and its estimated residual value is $2,000. After 3 years of straight-line depreciation, the asset's total estimated useful life was revised from 12 years to 10 years and there was no change in the estimated residual value The depreciation expense in year 4 is (Round your final answer to the nearest whole number.) $7$7 $4,225 $4,821 $4,500