$\backslash$table$[[$Security$,$Expected Return,Standard Deviation,Beta$],[$A$,15\%,8\%,1\mathrm{.}2],[$B$,12\%,14\%,0\mathrm{.}9],[$Risk$-$free asset,$5\%,3\mathrm{.}1\%,]]$

a$)(1$ point$)$ Regarding Securities A and B: Which has the least total risk?

b$)(1$ point$)$ Regarding Securities A and B: Which has the least systematic risk?

c$)(2$ points$)$ What is the value of systematic risk for a portfolio with $55\%$ of the funds invested in A; $25\%$ of the funds invested in B and the rest in the riskless asset?

d$)(2$ points$)$ What is expected return on the portfolio if you invest $55\%$ in A$,25\%$ in B and the rest in the risk$-$free asset?