Alphabet Inc. is evaluating its performance measurement system. The following data is available:

18. 
    
    • Revenue: $200 billion
    • Operating Income: $50 billion
    • Net Income: $40 billion
    • Total Assets: $300 billion
    • Total Equity: $200 billion

Requirements:

18. 
    
    5. Calculate the return on assets (ROA).
    6. Determine the return on equity (ROE).
    7. Compute the operating margin.
    8. Analyze the net profit margin.
    9. Evaluate Alphabet’s overall financial performance.