For the year ended September 26, 2015, Arriba Corporation reported net income of $2,080 million. Total shareholders' equity on this date was $18,748 million, and on September 27,2014 , it was $19,603 million. No preferred stock was outstanding in either year. Required: 1. Compute Arriba's return on common stockmolders' equity for the yeak ended September 26, 2015. Round your answer to two decimal places. % 2. What other ratio would you want to compute to decide whether Arriba is successfully employing leverage