i need help with part c

LO2, 3 E5-25. Compute and Interpret ROA, Profit Margin, and Asset Turnover of Competitors Selected balance sheet and income statement information for McDonald's Corporation and Yum! Brands, Inc., follows. MRC "s Corporation E: MCD rands, Inc. E. YUM Net Income Average Total Assets ($ millions) McDonald's ........ Yum! Brands.... Sales Revenue $27,441 13,279 Interest Expense $571 130 $4,758 1,021 $35,454 8,520 a. Compute the return on assets (ROA) for each company. b. Disaggregate ROA into profit margin (PM) and asset turnover (AT) for each company. c. Discuss any differences in these ratios for each company. Your interpretation should reflect the distinct business strategies of each company