I need the answer as soon as possible

A machine costing 400.000 was purchased on January 1,2015.estimate salvage is 40.000 and its expected life is 4 years. A) Calculate depreciation for 2015 using the straight line method. B) Calculate depreciation for all 4 years using the double declining balance method. C) Calculate depreciation for 2015 and 2016 using the sum of the years digits method