In 2010 Amazon Inc. was valued at $9,665 million and in 2014 they were valued at $29,478 million. How and why has the brand’s ranking changed? Identify and provide reasons that explain such changes. Consult additional sources (e.g., articles from print media, annual reports, the company’s Web site) to enhance your understanding of the factors and forces that contributed to the brand’s move up or down in the rankings. Please explain your conclusion by applying relevant marketing concepts. Please cite sources.