Pharoah Ltd. purchased a new machine on April 4, 2017, at a cost of $180,000. The companyestimated that the machine would have residual value of $16,000. The machine is expected to be used for 10,000 working hours during its four-year life. Actual machine usa was 1,500 hours in 2017; 2,200 hours in 2018; 2,500 hours in 2019; 2,000 hours in 2020; and 1,800 hours in 2021. Pharoah has a December 31 year end. (a) Calculate depreciation for the machine under each of the following methods: (Rou 1 d expense per unit to 2 decimal places, e.9. 2.75 and final answers to 0 decimal places, e.8. 5.275.) (1) Straight-line for 2017 through to 2021 2017 expense $ 2018 expense $ 2019 expense $ 2020 expense $ 2021 expense $ (2) Diminishing-balance using double the stralght-line rate for 2017 through to 2021 . 2017 expense $ 2018 expense $ 2019 expense $ 2020 expense $ 2021 expense $ (3) Units-of-production for 2017 through to 2021