PART II. Dunes Company purchased equipment on May 10 for $270,000. The equipment was expected to have a useful life of four years or 18,000 operating hours, and a residual value of $10,000. The equipment was used for 7,000 hours during Year 1,5,000 hours in Year 2, and 4,000 hours in Year 3. Instructions: Determine the amount of depreciation expense, accumulated depreciation and book value for the years ended December 31, Year 1, Year 2, and Year 3, by (a) the straight-line method, (b) the units-of- activity method, and (c) the double-declining-balance method. Straight-line Method Year 1 Year 2 Year 3 Depreciation Expense Accumulated Depreciation-Equip. Book Value Units of Activity Method Year 1 Year 2 Year 3 Depreciation Expense Accumulated Depreciation-Equip. Book Value Double-Declining Method Year 1 Year 2 Year 3 Depreciation Expense Accumulated Depreciation-Equip. Book Value