Question $3($Portfolio Returns and Deviations$)$: Consider the following information about three stocks:Probability of State of Economy a$.$ If your portfolio is invested $40$ percent each in $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ and $20$ percent in $\backslash ($ C $\backslash ),$ what is the portfolio expected return? The variance? The standard deviation? $(15$ points$)$ b$.$ If the expected T$-$bill rate is $\backslash (\backslash$mathbf$\{3.80\}\backslash )$ percent, what is the expected risk premium on the portfolio? $(5$ points$)$