You are analyzing the leverage of two firms and you note the following$($all values in millions of$$ dollars$)$:

Debt

Book Equity

Market Equity

Operating Income

Interest Expense

Firm A

$504\mathrm{.}2$

$298\mathrm{.}3$

$403\mathrm{.}2$

$98\mathrm{.}8$

$51\mathrm{.}3$

Firm B

$78\mathrm{.}3$

$36\mathrm{.}2$

$41\mathrm{.}7$

$8\mathrm{.}5$

$7\mathrm{.}4$

a$.$ What is the market$$ debt$-$to$-$equity ratio of each$$ firm?

b$.$ What is the book$$ debt$-$to$-$equity ratio of each$$ firm?

c$.$ What is the interest coverage ratio of each$$ firm?

d$.$ Which firm will have more difficulty meeting its debt$$ obligations?