When purchased, a vehicle had an estimated useful life of 12 years. The vehicle cost $55,000 and its estimated residual value is $4,000. After 3 years of straight-line depreciation, the asset's total estimated useful life was revised from 12 years to 9 years and there was no change in the estimated residual value. The Depreciation Expense in year 4 is: Multiple Choice 0 $5,392 $983 O $6,375 $5,667