Conduct a 4 page APA style paper for the company Berkshire Hathaway that is supported with at least 4 credible sources. This paper must detail the Porters Five Forces which include Corporate Threats of New Entrants, Corporate Threat of Substitutes, Supplier Power, Buyer Power, and Competitive Rivalry. Identify the corporate level strategy (i.e. related/unrelated diversification, vertical/horizontal integration, etc.) Identify strategic business units/divisions and analyze the relationship among the company's businesses units/divisions such as does the business units'/divisions' trade or exchange resources? Why? How? Or, is the company just running a portfolio of investments? Explain.

This analysis must have credible evidence that is discovered in the organization's 10k, or other internal documents and supported by credible external sources.