A firm currently has a cost of equity $($i$.$e$.,$ a required return on its equity$)$ of $15\%.$ It has no debt

outstanding, but bankers have offered to lend to it at an interest rate of $6\%,$ as long as it

maintains a debt$-$to$-$value ratio no greater than $\mathrm{.}3.$ What would the firm$$s new cost of equity be

if it borrows up to this amount of debt, converting to a debt$-$to$-$value ratio of $\mathrm{.}3?$