a$.$ Prepare a complete depreciation schedule, beginning with the current year, under each of the following methods listed $($assume that the half$-$year convention is used$).$ Include annual depreciation expense, accumulated depreciation, and book value for each year.

Straight$-$line.

$200$ percent declining$-$balance.

$150$ percent declining$-$balance, switching to straight$-$line when that maximizes the expense.