What is the required rate of return for the XYZ$,$ Inc., which holds four stocks? The market's required rate of return is $15\mathrm{.}0\%,$ the risk$-$free rate is $7\mathrm{.}0\%,$ and the fund's assets are as follows:

Stock Investment Beta

One $ $200,0001\mathrm{.}50$

Two $300,0000\mathrm{.}50$

Three $500,0001\mathrm{.}25$

Four $1,000,0000\mathrm{.}75$

Question $24$ options:

a$)$

$11\mathrm{.}23\%$

b$)$

$11\mathrm{.}82\%$

c$)$

$12\mathrm{.}45\%$

d$)$

$13\mathrm{.}10\%$