Google LLC provided the following financial data for the quarter ending March 31, 2024:

• Total assets: $180,000,000
• Total liabilities: $108,000,000
• Total equity: $72,000,000
• Net income: $18,000,000
• Sales revenue: $90,000,000
• Cost of goods sold: $54,000,000
• Operating expenses: $18,000,000
• Interest expense: $3,600,000
• Income tax expense: $4,500,000

Calculate the following ratios for Google LLC for the quarter ending March 31, 2024:

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