Depreciation by Three Methods; Partial Years Perdue Company purchased equipment on Apnil 1 for $39,390. The equipment was expected to have a usefur life of three years, or 5,400 cperating hours, and a fesidual value of \$1,590. The equipment was used for 1,000 hours dunng Year 1, 1,900 hours in Year 2,1,600 hours in Year 3 , and 900 hours in Year 4. Required: Determine the amount of depreoation expense for the years ended December 31, Year 1, Year 2, Year 3, and Year 4, by (a) the atraighe-ine method, (b) the units of activity method, and (c) the double-dedining-balance method. Notet Round all final values for each depreciation method and each vear to the nearest whole dollar. a. Straight-line method b. Units-of-activity method c. Double-declining-balance method