Depreciation by three methods; partial years

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:

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

b$.$ Units$-$of$-$activity method

c$.$ Double$-$declining$-$balance method