Part B. (4 marks) A machine costing $180,000 has an estimated residual value of $15,000 and an estimated service life of ten years. What is the annual depreciation for each of the first two full years under the following methods? 1. Double declining-balance: a. Year one b. Year two $ $ 2. Units of production. Lifetime production is estimated at 110,000 units; the machine produced 12,000 units in Year one and 18,000 in Year two: a. Year one $ b. Year two $