Analyze and compare Amazon.com, Best Buy, and Walmart Amazon.com, Inc. (AMZN) is one of the largest Internet retailers in the world. Best Buy Co., Inc. (BBY) is a leading retailer of consumer electronics and media products in the United States, while Walmart, Inc. (WMT) is the leading retailer in the United States. Amazon, Best Buy, and Walmart compete in similar markets Buy and Walmart sell through both traditional retail stores and the Internet, while Amazon sells only through the Internet. Sales and cash flow information from rece annual reports for all three companies is as follows (in millions): < Sales Net cash flows from operating activities Purchases of property, plant, and equipment Amazon $160,408 38,514 Best Buy Walmart (16,861) $43,638 $523,964 2,565 25,255 (743) (10,705) a. Determine the free cash flow for all three companies. Enter answers in millions. Amazon: S Best Buy: S Walmart: S b. Compute the ratio of free cash flow to sales for all three companies. Round percentages to one decimal place. Amazon: Best Buy: Walmart 96 c. How does Amazon compare to the other two companies with respect to generating free cash flow?