Depreciation by three methods; partial years Ferdue Company purchased equipment on April 1 for $38,680. The equipment was expected to have a useful life of 3 years, or 5,400 operating hours, and a ressdual value of $1,080. The equipment was used for 1,000 hours during 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 depreclation expense for the years ended December 31, Year 1, Year 2, Year 3, and Year 4, by (o) the straight-4line method, (b) the units-of. activity method, and (c) the double-doclining-balance method. Note: FOR DECLINING BALANCE ONLY, round the final multiplier to four decimal places. Then, round the answer for each year to the nearest whole dollar. a. Straight-line method b. Units-of-activity method c. Double-declining-balance method c. Double-declining-balance method