Procter & Gamble Co. has the following financial data for the fiscal year ending June 30, 2023:

• Total assets: $150,000,000
• Total liabilities: $90,000,000
• Total equity: $60,000,000
• Net income: $20,000,000
• Sales revenue: $100,000,000
• Cost of goods sold: $60,000,000
• Operating expenses: $20,000,000
• Interest expense: $2,000,000
• Income tax expense: $4,000,000

Calculate the following ratios for Procter & Gamble Co. for the fiscal year ending June 30, 2023:

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