What is the beta of a $3-$stock portfolio including $35\%$ of stock A with a beta of $0\mathrm{.}70,25\%$ of stock $B$ with a beta of $1\mathrm{.}07,$ and $40\%$ of stock $C$ with a beta of $1\mathrm{.}75?$

Multiple Choice

$1\mathrm{.}01$

$1\mathrm{.}21$

$1\mathrm{.}18$

$0\mathrm{.}86$