Depreciation by three methods; partial years

hours in Year $2,2,400$ hours in Year $3,$ and $1,400$ hours in Year $4.$

Required:

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