Calculating WACC $[$LO$1]$ Twice Shy Industries has a debt$-$equity ratio of $1\mathrm{.}5.$ Its

WACC is $8\mathrm{.}4$ percent, and its cost of debt is $5\mathrm{.}9$ percent. The corporate tax rate is

$35$ percent.

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

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

c$.$ What would the cost of equity be if the debt$-$equity ratio were $2?$ What if it were

$1\mathrm{.}0?$ What if it were zero?