Selected information taken from the 2019 annual report of Aardvark Company follows. During 2019, the company had no nonoperating or nonrecurring items included in income and had no outstanding preferred stock. 4 (s in millions) 2019 2018 Sales Interest expense Net income Total assets Dividends Total stockholders' equity Assumed tax rate Industry ROA Industry operating profit margin $19,903 $18,781 169 1,088 12,461 130 1,153 12,673 (153) (131) $ 4,288 4,007 35% 7.32% 6.1% 35% Required: a. For 2019, calculate: ROA, ROCE, operating profit margin, and asset turnover. Round your percentage answers to one decimal place. For example, .1234-12.3%. b. Based on the industry data provided, does Aardvark appear to have a competitive advantage (briefly explain your answer)? If so, what strategy is the firm apparently following