The following table contains financial statement information for OMV Group, which is a petrochemical company headquartered in Vienna. euros millions 2018 2017 2016 25,223 22,244 21,186 Sales Net profit (Loss) 3,958 1,783 (276) Assets 48,049 41,049 41,746 42,463 Equity 16,876 15,767 15,318 15,728 2015 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. 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. 2017 2016 Return on equity (ROE) Check 2018