Depreciation by Three Methods; Partial Years Perdue Company purchased equipment on April 1 for $58,740. The equipment was expected to have a useful life of three years, or 8,100 operating hours, and a residual value of $2,040. The equipment was used for 1,500 hours during Year 1,2,800 hours in Year 2,2,400 hours in Year 3 , and 1,400 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-iline method, (b) the units-ofactivity method, and (c) the double-declining-balance method. Note: Round all final values for each depreciation method and each year to the nearest whole dollar. a. Straight-line method b. Units-of-activity method b. Units-of-activity method c. Double-declining-balance method