Problem $16-12$ Calculating WACC $[$LO$1]$

Lunar Industries has a debt$-$equity ratio of $\mathrm{.}7.$ Its WACC is $9\mathrm{.}3$ percent, and its cost of debt is $6\mathrm{.}4$ percent. The corporate tax rate is $24$ percent.

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

Note: 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?

Note: 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 $2?$

Note: 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 $1?$

Note: 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?