6) DEPRECIATION Niles Construction Co. purchased a new crane for $350,000 on January 1, 2017. The crane has an estimated residual value of $32,000 and an estimated useful life of six (6) years. The crane is expected to last 10,000 hours. In year 1, the crane was used for 1,800 hours, in year 2 it was used for 2,000 hours and in year 3, 2,500 hours. Compute: Depreciation expense in 2019 depreciation methods below a) (b) Book value in 2019 using the different