Preston Corporation purchased a truck for $40,000. The company expected the truck to last four years or 100,000 miles, with an estimated residual value of $4,000 at the end of that time. During the second year, the truck was driven 27,500 miles. Compute the depreciation for the second year under each of the following methods: (a) straight-line, (b) production, and (c) double-declining-balance. (Show your work.)