Cullumber Ltd. purchased a delivery truck on January 1,2024, at a cost of $86,000. The truck is expected to have a residual value of $8,600 at the end of its 4 -year useful life. Cullumber has a December 31 year end. Use the diminishing-balance method and assume the depreciation rate is equal to douple the straight-line rate. (a) Your answer is correct. Calculate the depreciation for each year of the truck's life. Calculate the depreciation in total over the truck's life. Total depreciation expense $