I'm not too sure what i'm doing wrong for part C, need help with part c

Depreciation by Three Methods; Partial Years Perdue Company purchased equipment on April 1 for $75,870. The equipment was expected to have a useful life of three years, or 7,020 operating hours, and a residual value of $2,160. The equipment was used for 1,300 hours during Year 1, 2 hours in Year 2, 2,100 hours in Year 3, and 1,120 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) units-of-output method, and (c) the double-dedlining-balance method. Note: FOR DECLINING BALANCE ONLY, round the multiplier to four decimal places. Then round the answer for each year to the nearest whole dollar. a. Straight-line method Year Year 1 Year 2 Year 3 Year 4 Amount 18,427.5 24,570 24,570 6,142.5 b. Units-of-output method Year Year 1 Year 2 Year 3 Year 4 Amount 13,650 v 26,250 22,050 11,760 c. Double-declining-balance method Amount 37,935 X 25,290 Year i Year 2 Year 3 Year 4 8,430 X 2,810 X