1) For fiscal year 2015, Walmart Stores Inc. (WMT) had total revenues of $484.65 billion, net income of $16.36 billion, total assets of $203.49 billion, and total shareholder's equity of $81.39 billion. Please calculate Wal-Mart's ROE directly, and using the DuPont Identity. Please show all your process. 2) For fiscal year 2015, Costco Wholesale Corporation had a net profit margin of 2.05%, asset turnover of 3.48, and a book equity multiplier of 3.15. Use this data to compute Costco's ROE using the DuPont Identity. Please show all your process. 3) Compare the information you obtained in 1) and 2), use the DuPont Identity to understand the difference between the two firms's ROEs