A short $290230-mm$ column supports the three axial loads as shown in the figure below. Given:

$a=290mm$

$b=230mm$

$h=450mm$

$P_1=60kN$

$P_2=30kN$

$P_3=30kN$

Modulus of elasticity $=45$GPa

Shear Modulus $=8$GPa

NOTE:

$I_x=\frac{w{t}^3}{12},$;$,I_y=\frac{t{w}^3}{12}$

Assuming that the section remains plane, Answer the following:

The stress at point $"A"=$

MPa $[$with appropriate sign$]$

The stress at point $"$B$"=$

MPa $[$with appropriate sign$]$