Google LLC has the following financial data for the fiscal year ending December 31, 2023:

• Total assets: $180,000,000
• Total liabilities: $108,000,000
• Total equity: $72,000,000
• Net income: $30,000,000
• Sales revenue: $150,000,000
• Cost of goods sold: $90,000,000
• Operating expenses: $30,000,000
• Interest expense: $6,000,000
• Income tax expense: $9,000,000

Calculate the following ratios for Google LLC for the fiscal year ending December 31, 2023:

1. Current ratio
2. Debt-to-equity ratio
3. Gross margin ratio
4. Net profit margin ratio