A tractor for over-the-road hauling is purchased for $90,000.00. It is expected to be of use to the company for 6 years, after which it will be salvaged for $4,000.00. Calculate the depredation deduction and the unrecovered investment during each year of the tractors Ite. a. Use straight-line depreciation. Provide depreciation and book value for year 6. Deprecation for year 6 - $ book value for year 6 - SL b. Use declining balance depreciation, with a rate that ensures the book value equals the salvage value. Provide depreciation and book value for year 6. Depreciation for year 6 = book value for year 6 - c. Use double declining balance depreciation. Provide depreciation and book value for year 6. Depreciation for year book value for years d. Use double declining balance, switching to straight line depreciation Provide recit on and book forward Depreciation for years