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

$\backslash$table$[[,$Debt,Book Equity,Market Equity,Operating Income,Interest Expense$],[$Firm A$,497\mathrm{.}6,301\mathrm{.}9,398\mathrm{.}1,100\mathrm{.}5,49\mathrm{.}9],[$Firm B$,80\mathrm{.}5,36\mathrm{.}7,38\mathrm{.}3,7\mathrm{.}7,6\mathrm{.}7]]$

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?