Company: IBM (International Business Machines Corporation)

IBM disclosed its financial results for the fiscal year ending December 31, 2023. The company reported total revenue of $120 billion, with a cost of goods sold (COGS) of $50 billion and operating expenses of $40 billion. Net income amounted to $20 billion. Given this data: 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 $200 billion.