Identification of Commodity Businesses. A recent article in Fortune magazine listed the following firms among the top $10$ most admired companies in the United States: Dell, Southwest Airlines, Microsoft, and Johnson & Johnson. Access the websites of these four companies or read the Business section of their Form $10-$K reports $($www$.$sec$.$gov$).$ Discuss the companies$$ strategies using the framework discussed in the chapter, and describe whether you would view their products or services as commodities. Explain your reasoning.