CCC Corp has a beta of $1\mathrm{.}5$ and is currently in equilibrium. The required rate of return on the stock is $12\mathrm{.}00\%$ versus a required return on an average stock of $10\mathrm{.}00\%.$ Now the required return on an average stock increases by $45\mathrm{.}0\%($not percentage points$).$ Neither betas nor the risk$-$free rate change. What would CCC$\text{'}$s new required return be$?$ Do not round your intermediate calculations.

a$.$

$20\mathrm{.}81\%$

b$.$

$18\mathrm{.}75\%$

c$.$

$15\mathrm{.}38\%$

d$.$

$17\mathrm{.}63\%$

e$.$

$21\mathrm{.}56\%$