i need help with all three parts

-/1 = Swifty Corporation purchased a new machine on October 1, 2020, at a cost of $115,000. The company estimated that the machine will have a salvage value of $10,500. The machine is expected to be used for 10,000 working hours during its 5-year life. Compute the depreciation expense under straight-line method for 2020. (Round answer to 0 decimal places, eg, 2.125.) 2020 Depreciation expense $ 5225 eTextbook and Media Compute the depreciation expense under thits-of-activity for 2020, assuming machine usage was 1,760 hours. (Round depreciation cost per unit to 2 decimal places, c.g. 0.50 and depreciation rate to 0 decimal places, c.8. 15%. Round final answer to 2 decimal places.f-8.2.125.25.) 2020 Depreciation expense $ Compute the depreciation expense under declining-balance using double the straight-line rate for 2020 and 2021. (Round answers to O decimal places, e.g. 2,125.) 2020 2021 Depreciation expense eTextbook and Media