A truck acquired at a cost of $590,000 has an estimated residual value of $33,200, has an estimated usefuf life of 64,000 milfn, and was driven 5,100 miles during the year. Determine the following. If required, round your answer for the depreciation rate to two decimat places. a. The depreciable cost b. The depreciation rate per mile c. The units-of-activity depreciation for the year