Banger Co. purchased delivery equipment for $33,000 on January 1 , Year 1 . Banger estimated that the delivery equipment would have a Ilfe of five years and a $7,000 salvage value. Banger uses the straight-line method to compute the depreclation expense. At the beginning of year 4, Banger revised the useful life of the delivery equipment to be a total of seven years. The estimated salvage value was not changed. Compute the depreciation expense for each of the seven years