Answer the question. A delivery truck was just purchased for $80,000. It's estimated salvage value at the end of its useful life, in 8 years, is $20,000. Assume 25% tax rate, and straight-line depreciation. a. What is the amount of annual depreciation? b. What is the book value after 6 years? c. Assuming the company decides to sell the truck after 6 years of service, and receives $50,000 from the sale, calculate the after-tax net cash inflow from the sale of the truck