Please all work show(if you can)

On June 1, 2011 Hanks Co purchased machinery at a cost of $42,000. The machinery is expected to last ten years and have a residual value of $6,000. Instructions: Compute depreciation for 2011, 2012 and 2013 and the book value of the drill press at December 31, 2013, assuming the (a) sum-of-the-years'- digits method is used (b) double declining balance