$5.$ A firm just paid an annual dividend of $$4$ per share. This dividend is expected to grow at a rate of $6$ percent per year forever. If the current market price for a share of the company$$s stock is $$50,$ find the cost of equity $($or required return on equity.$)$

$6.$ Treasury bills currently have a return of $5$ percent and the return on the S&P $500$ is $11$ percent. If a company has a beta of $1\mathrm{.}30,$ what is its required return on equity $($or cost of equity$)?$

$7.$ Suppose a firm$$s capital structure consists of debt and common equity. The firm has a cost of equity of $14$ percent and a pre$-$tax cost of debt of $8$ percent. If the target debt$/$equity ratio is $0\mathrm{.}60($or $60$ percent$),$ and the tax rate is $25$ percent, what is the firm$$s weighted average cost of capital $($WACC or RWACC$)?$