Show all the steps and calculations please and thank you :)

Blue Spruce Corp. purchased a boardroom table for $ 24,000. The company planned to keep it for four years, after which it was expected to be sold for $ 1,000. (a) Calculate the depreciation expense for each of the first three years under the straight-line method and the double- diminishing-balance method, assuming the table was purchased early in the first month of the first year. (2) Double-diminishing-balance method. Year 1 $ Year 2 $ Year 3 $