Forty-Niner Co purchased a computer for exist325,000 on January 2, 2017. The company expects the computer to last for 8 years or 15,000 hours of operation, with an estimated residual value of exist25,000. During 2017 the computer was operated for 2,000 hours, while in 2018 it was operated for 2, 600 hours Required: Calculate the depreciation expense for the computer for 2017 and 2018 using the following depreciation methods: a) Straight-line. b) Declining-balance at twice the straight-line rate. c) Units of production