Answer:
Depreciation expense for year 4 = $16,750
Explanation:
We know,
Depreciation expense under the straight-line  method = (Cost price - Salvage value) ÷ Useful life
We know that the depreciation expense under the straight-line  method is always equal over the useful life.
Given,
The cost price of a machine = $76,000
Salvage value = $9,000
Useful life = 4 years
Therefore,
Depreciation expense for year 4 = ($76,000 - $9,000) ÷ 4 years
Depreciation expense for year 4 = $67,000 ÷ 4 years
Depreciation expense for year 4 = $16,750