You are holding a stock that has a beta of $3\mathrm{.}43$ and is currently in equilibrium. The required return on the stock is $54\mathrm{.}66\%$ and the return on a risk$-$free asset is $4\mathrm{.}0\%.$ What would be the return on the stock if the stock's beta increased to $4\mathrm{.}12$ while the risk$-$free rate and market return remained unchanged?

$54\mathrm{.}66\%$

$81\mathrm{.}33\%$

$64\mathrm{.}85\%$

$74\mathrm{.}39\%$

$58\mathrm{.}95\%$