4. The initial cost of purchasing a device is $12,000. The salvage value of the device at the end of four years is $3,500. Compute the depreciation schedule for the device by the following methods: Straight-line depreciation (5 pts) Sum-of-years-digits depreciation (10 pts) CCA depreciation as a Class 43 asset (10 pts) CCA depreciation as a Class 29 asset (10 pts)