Evaluate the debt-to-equity ratios of three  companies:

Company	Total Debt (in billions)	Shareholder's Equity (in billions)
Verizon	$150	$100
Exxon Mobil	$120	$200
AT&T	$180	$150

Requirements:

• Calculate the debt-to-equity ratio for each company.
• Interpret the debt-to-equity ratios and discuss the capital structure of each company.
• Compare the debt-to-equity ratios and assess the financial leverage of the companies.