$\backslash$table$[[$Security$,$Covariance,$],[,$A$,$B$,$C$,$D$,,$A$,$B$,$C$,$D$],[E(R),9\%,11\%,8\%,10\%,$A$,0\mathrm{.}18,0\mathrm{.}22,0\mathrm{.}16,0\mathrm{.}14],[,0\mathrm{.}180,0\mathrm{.}260,0\mathrm{.}13,0\mathrm{.}22,$B$,0\mathrm{.}22,0\mathrm{.}33,0\mathrm{.}12,0\mathrm{.}15],[,\mathrm{.}92,1\mathrm{.}2,0\mathrm{.}85,0\mathrm{.}98,$C$,0\mathrm{.}16,0\mathrm{.}12,0\mathrm{.}20,0\mathrm{.}11],[,,,,,$D$,0\mathrm{.}14,0\mathrm{.}15,0\mathrm{.}11,0\mathrm{.}26]]$

Using the table $($above$)$:

$($i$)$ Calculate the variance of a portfolio that is long $70\%$A and $60\%B,$ and short $30\%C$

$($ii$)$ Calculate the expected return on that portfolio

$(15$ marks$)$

$($iii$)$ Calculate the beta of the same portfolio

$(5$ marks$)$

$(5$ marks$)$