Calculate the depreciation expense for each of the first three years under $(1)$ the straight$-$line method, and $(2)$ the double$-$

diminishing$-$balance method, assuming the company purchased the table early in the first month of the first year.

$(1)$ Straight$-$line method.

Year $1,$$

Year $2,$$

Year $3,$$

$(2)$ Double$-$diminishing$-$balance method.

Year $1,$$

Year $2$$

Year $3,$$Riverbed Corporation purchased a boardroom table for $$18,000.$ The company planned to keep it for four years, after which it was

expected to be sold for $$2,000.$