2. 12.21 An automated shuttle retriever system has a first cost of $350,000, a depreciable life of 5 years, and an expected salvage value of 20% of the first cost. Using the MACRS depreciation rates of 20.00, 32.00, 19.20, and 11.52% for years 1, 2, 3, and 4, respectively, determine

(a) the depreciation for year 3, and

(b) the book value at the end of year 4.