Perdue company purchased

equipment on aprl $1$ For $36,180.$ The equipment was expected to havs a usedul life of three yeats ors oful life of three years oe a useful life of three years, or $7020$ operating hours, and a residual value of $1,080.$ The equipment was used dor $1,300$for $1,300$ hours during year $1,2500$ hours in year $2,2100$ hours in year $3,$ and $1,120$ hours in year $4.$

Determine the amount id depreciation for years ended December $31,$ year $1,$ year $2,$ year, and year $4,$for a use by the straight$-$line method, for b use units of activity method, and for c use double declining balanced method.