Problem 10 (16) Use the following to answer the questions below: On April 1, 2021, Hobart. Co. purchased a machine at a cost of $36,000. The machine is expected to last 10 years and has a residual value of $6,000. During its 10-year life, the machine is expected to produce 500,000 units of product. In 2021 and 2022, 75,000 and 84,000 units, respectively, were produced. Required: SHOW ALL COMPUTATIONS a) Compute depreciation expense for 2021 and 2022, assuming the straight-line method is used. b) Compute depreciation expense for 2021 and 2022, assuming the double-declining- balance method is used. c) Compute depreciation expense for 2021 and 2022, assuming the sum-of-the-years'-digits method is used. You must show how you computed the sum of the digits (denominator). d) Compute depreciation expense for 2021 and 2022, assuming the units-of-production method is used