In 2017, Barb's Florist purchases at $13,000 a truck with a salvage value $1,000, and 5 years of useful life. Annual mileages for the next five years are: 15,000 in 2017, 30,000 in 2018, 20,000 in 2019, 25,000 in 2020, and 10,000 in 2021. a) Calculate annual depreciation, accumulated depreciation, and book value using straight-line method. b) Calculate annual depreciation, accumulated depreciation, and book value using units-of-activity method. c) Calculate annual depreciation, accumulated depreciation, and book value using declining-balance method