Liz Raiborn Inc. has the following financial results for the years 2019 through 2021 for its three regional divisions: 2019 2020 2021 Revenue Southwest $ 14 , 725 $ 21, 825 $ 25 , 825 Midwest 6,525 6, 825 7, 025 Southeast 12,225 12, 825 13 , 125 Total $ 33, 475 $ 41, 475 $ 45, 975 Net Operating Income Southwest 925 $ 1, 025 1, 175 Midwest 1,075 1, 425 1, 375 Southeast 825 1, 025 1, 425 Total 2, 825 $ 3,475 $ 3,975 Average Total Assets Southwest $ 13, 825 $ 14, 025 $ 16 , 625 Midwest 4, 525 4, 025 4, 025 Southeast 5, 125 5, 425 5, 425 Total $ 23, 475 $ 23, 475 $ 26, 075 Required: Calculate return on sales (ROS), asset turnover (AT), and return on investment (ROI) for each division and also for the firm as a whole for each of the three years 2019, 2020, and 2021. (Note: Due to rounding your percentages, the totals for the firm might not be the actual total of the individual divisions.) (Round "Asset turnover (AT)" answers to 3 decimal places and other answers to 1 decimal place.) 2019 020 202 Return on sales (ROS Southwes % % % Midwest % % % Southeast % % % Firm % % % Asset turnover (AT) Southwes Midwes Southeast Firm Return on investment (ROI) Southwes % % % Midwest % Southeast % % % Firm % %