Abbott Laboratories, a global healthcare company, reported its financial data for the fiscal year

2023. The company's total assets amounted to $300 billion, with total liabilities of $180 billion.

Its net income for the year stood at $30 billion, and the shareholders' equity was $120 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.