PROBLEM $2$: Week $3$ and Week $4$ Cost of Capital

The capital structure for HCA is provided below. If the firm has a $5\%$ after tax cost of debt, $9\%$ commerical loan rate,

a $11\mathrm{.}5\%$ cost of preferred stock, an $15\%$ cost of common stock, and given the dollar amounts provided below, what is the firm's

weighted average cost of capital $($WACC$)?$

Weighted Costs