Solve a& b please.

Recording a Change in Accounting Estimate Epsom Company purchased a machine that cost $50,000 on january 1, eight years ago. The estimated useful life was 12 years, and the estimated residual value was \$0. Straight-ine depreciation is used, At the start of the current year, before making any adjusting entry to record depreciation expense for that year, the company decided that the machine should be depreciated over a 15-year total useful life. a. Prepare the adjusting entry at December 31 of the currentiyear for annual depreciation expense: Round the answers to the nearest doliar. b. Prepare the correcting entry required, if any, at December 31 of the current year, If none is required, provide the rolison