Depreciation by Three Methods; Partial Years Ferdue Company purchased equipment on October 1 for $46,780. The equipment was expected to have a useful life of three years, or 6,400 operating hours, and a residuai value of 51,980 . The equipment was used for 1,200 hours during Year 1,2,200 hours in Year 2,1,900 hours in Year 3 , and 1,100 hours in Year 4 , Required: Determine the amount of depreciation expense for the years ended December 31, Year 1, Year 2, Year 3, and Year 4, by (a) the straight-ine meethod, (b) the units-ofactivity method, and (c) the couble-declining balance method. Note: Pound ail final values for each depreciation method and each year to the nearest whole doilar a. Straight-line method b. Units-of-activity method c. Double-declining-balance method