In 2018, FedEx had total assets of $50.1 billion, an asset turnover ratio of 1.32 times, and a net profit margin of 9.7%. a. What is FedEx's return on assets? b. Find FedEx's ROE, given that 34.7% of the assets are financed with stockholders' equity. a. FedEx's return on assets (ROA) is %. (Round to two decimal places.)