how do you solve this? what are the answers to this question

Problem \#3 - Depreciation Example 25 points - S Company purchased a fabricating machine on January 1,2006 at net cost of $200,000 - Estimates a 4 year useful life - Salvage value =$60,000 - Fiscal year ends December 31st - Estimate machine hours 25,000 - Actual machine hours Compute Depreciation Expense for 2006 through 2009 using the following methods: a. Sum of the years digits b. Double declining balance