Delta Air Lines, Inc. (DAL) reported the following data (in millions) for a recent year: Sales…………………………………………………$40,704 Operating Income……………………………………….4,526 Average total assets…………………………………..53,570 Average stockholders equity………………………….9,832 1. Compute the return on total assets. Round to one decimal place. 2. Compute the return on stockholders equity. Round to one decimal place. 3. Compute the profit margin, asset turnover, and financial leverage metrics using the expanded DuPont formula. Round profit margin, asset turnover, and financial leverage to two decimal places. Round return on stockholders equity to one decimal place.