Please help me with these financial accounting question. Thank you:

What trend, if any, is evident? How does Wal-Mart's ROA compare with the approximately 7.1% median ROA for companies in the Dow Jones Industrial average for 2015? OvVal-Mart's ROA increased slightly from 2014 to 201 5 and is above the median for other Dow Jones companies. OvVal-Mart's ROA decreased from 2014 to 201 5 and is lower than the median for other Dow Jones companies. OvVal-Mart's ROA increased from 2014 to 201 S but is slightly below the median for other Dow Jones companies. OvVal-Mart's ROA decreased slightly from 2014 to 2015 but still exceeds the median for other Dow Jones companies. (c) Which of the following factors might allow a company like Wal-Mart Stores, lnc to reap above-average returns? OvVal-Mart Stores, lnc operates with more assets and equity than the average company. OvVal-Mart Stores, Inc's spends very little on advertising, thus generating a greater profit on sales. OvVal-Mart has considerable market power over suppliers as a result of its considerable size, which may result in product cost savings. OvVal-Mart Stores, Inc's sales level is greater than the typical company.