A company has the following financial data. Calculate the following ratios: (a) Current Ratio, (b) Quick Ratio, (c) Debt to Equity Ratio, and (d) Return on Equity.

• Current Assets: $150,000
• Inventory: $40,000
• Current Liabilities: $100,000
• Total Liabilities: $200,000
• Shareholders' Equity: $300,000
• Net Income: $50,000

Requirements:

1. Calculate the Current Ratio.
2. Calculate the Quick Ratio.
3. Calculate the Debt to Equity Ratio.
4. Calculate the Return on Equity.