Alibaba Group Holding Limited disclosed the following financial results: Total Revenue of $109,480 million, Cost of Goods Sold (COGS) of $61,400 million, Operating Expenses of $22,000 million, and Interest Expense of $1,200 million. The company’s Income Tax Expense was $5,800 million, and it reported Net Income of $19,080 million. Alibaba’s total assets were valued at $250,000 million, and total equity was $120,000 million.

Questions:

1. What is Alibaba's gross profit margin?
2. Calculate Alibaba's operating profit margin.
3. Determine Alibaba's net profit margin.
4. Calculate the return on assets (ROA) for Alibaba.
5. Compute the return on equity (ROE) for Alibaba.