Consider the following information:

a$.$ Your portfolio is invested $25$ percent each in A and $C,$ and $50$ percent in $B.$ What is

the expected return of the portfolio? $($Do not round intermediate calculations and

enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$-1.$ What is the variance of this portfolio? $($Do not round intermediate calculations and

round your answer to $5$ decimal places, e$.$g$.,16161.)$

b$-2.$ What is the standard deviation? $($Do not round intermediate calculations and enter

your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$