The following table contains financial statement information for OMV Group, which is a petrochemical company headquartered in Vienna. Required a. What was OMV Group's return on assets (ROA) for 2016, 2017, and 2018 ? b. Determine its profit margin (PM) for each of the three years 2016-2018. c. Determine its asset turnover (AT) for each of the three years 2016-2018. Notes: - Round ROA and PM answers to one decimal place (ex: 0.2345=23.5% ). - Round AT answers to two decimal places (ex: 0.56789=0.57 ). - Use negative signs with answers, when appropriate. d. What factor is mainly responsible for the change in OMV's ROA from 2016 to 2017 ? Is it profit margin or asset turnover or both? e. What factor is mainly responsible for the change in OMV's ROA from 2017 to 2018 ? Is it profit margin or asset turnover or both? f. Determine OMV Group's return on equity (ROE) for each of the three years 2016-2018. Notes: - Round ROE answers to one decimal place (ex: 0.2345=23.5% ). - Use negative signs with answers, when appropriate