Facebook, Inc., a social media giant, disclosed its financial figures for the year ending 2023.

The company's total assets amounted to $700 billion, with total liabilities of $400 billion. Its net

income for the year stood at $50 billion, and the shareholders' equity was $300 billion.

a) Determine the company's debt-to-assets ratio.

b) Calculate the company's debt-to-equity ratio.

c) Find out the return on assets (ROA) percentage.

d) Calculate the return on equity (ROE) percentage.