Solar Industries has a debt$-$equity ratio of $1\mathrm{.}5.$ Its WACC is $7\mathrm{.}7$ percent, and its cost of debt

is $5\mathrm{.}4$ percent. The corporate tax rate is $25$ 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$-1.$ What would the cost of equity be if the debt$-$equity ratio were $2?($Do not round

intermediate calculations and enter your answer as a percent rounded to $2$

decimal places, e$.$g$.,32\mathrm{.}16.)$

c$-2.$ What would the cost of equity be if the debt$-$equity ratio were $1?($Do not round

intermediate calculations and enter your answer as a percent rounded to $2$

decimal places, e$.$g$.,32\mathrm{.}16.)$

c$-3.$ What would the cost of equity be if the debt$-$equity ratio were zero? $($Do not round

intermediate calculations and enter your answer as a percent rounded to $2$

decimal places, e$.$g$.,32\mathrm{.}16.)$