Douwd, Inc. purchases a truck that cost $42,000, has a salvage value of $7,000 and a 7 year useful life. Douwd, Inc. uses straight line depreciation. What is Douwd's yearly depreciation amount and what is the balance in their accumulated depreciation account at the end of year 3 ? $5,000 annual depreciation; $15,000 accumulated depreciation $6,000 annual depreciation; $5,000 accumulated depreciation $6,000 annual depreciation; $18,000 accumulated depreciation $6,000 annual depreciation; $15,000 accumulated depreciation