GHI Corporation presents the following financial figures:

• Total assets: $2,400,000
• Total liabilities: $1,000,000
• Preferred stock: $200,000
• Common stock: $600,000
• Additional paid-in capital: $300,000
• Retained earnings: $500,000
• Net income: $400,000

Find out: a) Times interest earned ratio b) Price-to-earnings ratio c) Return on common equity d) Earnings before interest and taxes (EBIT)