In 2018, FedEx had total assets of $50.6 billion, an asset turnover ratio of 1.48 times, and a net profit margin of 11.1%. a. What is FedEx's return on assets? b. Find FedEx's ROE, given that 40.7% of the assets are financed with stockholders' equity. a. FedEx's return on assets (ROA) is \%. (Round to two decimal places.)