$1.$ Dickson, Inc., has a debt$-$equity ratio of $2\mathrm{.}3.$ The firm$$s weighted average cost of capital is $9$ percent and its pretax cost of debt is $5\mathrm{.}3$ percent. The tax rate is $24$ percent.

a$.$ What is the company$$s cost of equity capital?

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b$.$ What is the company$$s unlevered cost of equity capital?

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c$.$ What would the company$$s weighted average cost of capital be if the firm$$s debt$-$ equity ratio was $\mathrm{.}75?$ What if it were $1\mathrm{.}3?$