Depreciation by three methods; partial years Perdue Company putchased equipment on April 1 for $46,710. The equipment was expected to have a useful life of 3 years, or 7,560 operating hours, and a residyaf value of \$1,350. The equipment was used for 1,400 hours during Year 1, 2,600 hours in Year 2,2,300 hours in Year 3 , and 1,260 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-line method, (b) the units-ofactivity method, and (c) the double-decining-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 D. Units-of-activity method a. Straight-line method b. Units-of-activity method c. Double-declining-balance method