MNO Corporation's financials include:

• Total assets: $1,200,000
• Total liabilities: $500,000
• Common stock: $350,000
• Preferred stock: $80,000
• Retained earnings: $270,000
• Net income: $180,000
• Total revenues: $1,000,000

Determine: a) Debt-to-total-assets ratio b) Price-to-book ratio c) Return on common equity d) Earnings per share