$17)$ Security A has an expected rate of return of $12\%$ and a beta of $1\mathrm{.}1.$ The market expected rate of return is $8\%,$ and the risk$-$free rate is $5\%.$ The alpha of the stock is $?$

$18)$ If the beta of the market index is $1$ and the standard deviation of the market index increases from $12\%$ to $24\%,$ what is the new beta of the market index?