b. Assume that the machine was purchased on July 1. Calculate each year's depreciation expense for the machine's useful life under each of the following depreciation methods: 1. Straight-line. 2. Double-declining balance. 1. Straight-Line 2. Double-declining balance (Round answers to the nearest whole number, when appropriate.) b. Assume that the machine was purchased on July 1. Calculate each year's depreciation expense for the machine's useful life under each of the following depreciation methods: 1. Straight-line. 2. Double-declining balance. 1. Straight-Line 2. Double-declining balance (Round answers to the nearest whole number, when appropriate.)