Instructions: Using the sum-of-the-years'-digit and double-declining balance depreciation methods, compute the depreciation expense for 2022 and 2023 and the book value of the machine at the end of 2023 for each of the following two independent cases. Please show your work briefly and have your final answers summarized in the tables. Round the final answers in the tables to the nearest dollar when needed. a. Gold Co. acquired a machine on Jan. 1, 2022, at a cost of 56,000. The machine has an estimated salvage value of $ 3,500 at the end of its 7-year useful life. The depreciation adjustment is done at the end of every calendar year. Depreciation method Sum-of-the-years'-digits Double declining balance Depreciation expense Depreciation expense Book value as of for 2022 for 2023 Dec. 31, 2023 b. Silver Co. acquired a machine on November 1, 2022, at a cost of $56,000. The machine has an estimated salvage value of $ 3,500 at the end of its 7-year useful life. The depreciation adjustment is done at the end of every calendar Depreciation method Sum-of-the-years'-digits Double declining balance year. Depreciation expense for 2022 Depreciation expense Book value as of for 2023 Dec. 31, 2023