Units-or-activity Depreciabon A truck acquired at a cost of $200,000 has an estimated residuat value of $11,050, has an estimated useful life of 53,000 miles, and was driven 4,600 miles during the year. Determine the following. If required, round your ansver for the depreciation rate to two docimal places, (a) The depreciable cost (b) The depreciation rate per mile (c) The units-of-activity deprociation for the year