A short $290170-mm$ column supports the three axial loads as shown in the figure below. Given:

$a=290mm$

$b=170mm$

$h=250mm$

$P_1=45KN$

$P_2=55KN$

$P_3=40KN$

Modulus of elasticity $=45$GPa

Shear Modulus $=8$GPa

Assuming that the section remains plane, Answer the following:

The stress at point $"$B$"=$ MPa $[$with appropriate sign$]$

The stress at point $"$D$"=$ MPa $[$with appropriate sign$]$

The stress at point $"$E$"=$ MPa $[$with appropriate sign$]$