Shaw Communications is currently financed with$30\%$ equity,$10\%$ preferred$$ stock, and$60\%$ debt. It has a cost of equity capital of$11\%,$ a cost of preferred stock of$7\mathrm{.}5\%,$ and its pretax cost of debt is$6\%.$ If the firm has a tax rate of$30\%,$ what is$$ Shaw's weighted average cost of capital$($WACC$)?$