Problem $18-5$ WACC

Whispering Pines Incorporated is all$-$equity$-$financed. The expected rate of return on the company's shares is $12\%.$

a$.$ What is the opportunity cost of capital for an average$-$risk Whispering Pines investment?

b$.$ Suppose the company issues debt, repurchases shares, and moves to a $30\%$ debt$-$to$-$value ratio $(\frac{D}{V}=0\mathrm{.}30).$ What will be the

company's weighted$-$average cost of capital at the new capital structure? The borrowing rate is $7\mathrm{.}5\%$ and the tax rate is $21\%.$

Note: Do not round intermediate calculations. Enter your answer as a percent rounded to $2$ decimal places.

Answer is complete but not entirely correct.