Company: McDonald's Corporation

McDonald's Corporation disclosed its financial performance for the fiscal year ending December 31, 2023. The company reported total revenue of $50 billion, with a cost of goods sold (COGS) of $20 billion and operating expenses of $15 billion. Net income stood at $10 billion. Based on this information: a) Calculate the gross profit margin. b) Determine the operating profit margin. c) Compute the net profit margin. d) Analyze the return on assets (ROA) if the company's total assets amount to $30 billion.