A firm has decided to use the capital asset pricing model $($CAPM$)$ to calculate the cost of its internal common stock equity for its WACC. If the firm has a beta of $1\mathrm{.}42,$ the risk$-$free rate as measured by the rate on short$-$term U$.$S$.$ Treasury bills is $3\mathrm{.}02\%,$ and the expected market risk premisum is $6\mathrm{.}11\%.$ What would the firm's cost of common stock equity be$?($Please enter your answer to two decimal point precision $-$ in other words, if you calculate $9,87736\%,$ then enter $9\mathrm{.}88.)$