When originally purchased, a vehicle had an estimated useful life of 9 years. The vehicle cost $33,000 and its estimated residual value is $3,000. After 3 years of straight-line depreciation, the assets total estimated useful life was revised from 9 years to 5 years and there was no change in the estimated residual value. The Depreciation Expense in year 4 is which amount:

$6,000

$2,275

$5,725

$10,000