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