In the Given setup, three loads $65KN$ are applied at point $1,2,$ and

$3$

$If$

$a=130mm$

$b=83mm$

$c=110mm$

Determine moment around z$-$axis $M_z=$ KN$.$m

Determine the moment of inertia for the cross$-$section ABEF around $z-$axis $I_z=m{m}^4$

If loads $65$ KN are applied at points $1$ and $2$ only. and the moment of inertia for the cross$-$section ABEF around the $z-$ axis is $10482761\mathrm{.}67m{m}^4$

Determine the stress at point A$,{}_A=,$ Mpa $["+"$ for tension, $"-"$ for compression $]$

If loads $65$ KN are applied at points $1$ and $2$ only. and the moment of inertia for the cross$-$section ABEF around the $z-$ axis is $10482761\mathrm{.}67m{m}^4$

Determine the stress at point $B,{}_B=|$Mpa $["+"$ for tension, $"-"$ for compression $]$