did i do this correctly ?

A machine costing $937,500 with a five-year useful life and a $93,750 salvage value is installed in the factory on January 1 . The factory manager estimates the machine will produce 25,000 units of product during its life. It actually produces the following units: 4,000 in Year 1;5,000 in Year 2;6,000 in Year 3;6,000 in Year 4; and 4,000 in Year 5. Calculate annual depreciation expense using the straight-line, units-of-production, and double-declining balance methods