Dickson, Incorporated, has a debt$-$equity ratio of $2\mathrm{.}5.$ The firm$$s weighted average cost of capital is $11$ percent and its pretax cost of debt is $9$ percent. The tax rate is $22$ percent.

a$.$ What is the company$$s cost of equity capital? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ What is the company$$s unlevered cost of equity capital? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

c$.$ What would the company$$s weighted average cost of capital be if the company's debt$-$equity ratio were $\mathrm{.}60$ and $1\mathrm{.}50?($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$