A non$-$standard I section is shown in the Figure $2$ below$\mathrm{.}3\mathrm{.}1$ Calculate the point of centroid. $[4]3\mathrm{.}2$ Calculate the second moment of area about x$-$x$,$ xxI $[7]3\mathrm{.}3$ Calculate the second moment of area about y$-$y$,$ yyI $[3]3\mathrm{.}4$ Calculate radius of gyration, yx randr $[2]3\mathrm{.}5$ Calculate the elastic section modulus, Zex $[1]3\mathrm{.}6$ Calculate the plastic section modulus, Zpx $[3]$Figure $2$