Blossom Ltd. purchased a new machine on April 4,2017, at a cost of $172,000. The company estimated that the machine would have a residual value of $16,000. The machine is expected to be used for 10,000 working hours during its four-year life. Actual machine usage was 1,500 hours in 2017:2,100 hours in 2018; 2,000 hours in 2019:2,400 hours in 2020; and 2,000 hours in 2021. Blossom has a December 31 year end. (a) Calculate depreciation for the machine under each of the following methods: (Round expense per unit to 2 decimal places, es. 2.75 and final answers to 0 decimal ploces, e.s. 5,275 .) (1) Straight-line for 2017 through to 2021. (2) Diminishing-balance using double the straight-line rate for 2017 through to 2021. (3) Units-of-production for 2017 through to 2021. 2017expense2018expense$2020expense$2021expense$$$$