The stress at a point, material properties, and change in temperature are as given below. Calculate $\epsilon_{xx}$, $\epsilon_{yy}$, $\gamma_{xy}$, $\epsilon_{zz}$, and $\sigma_{zz}$ (a) assuming plane stress, and (b) assuming plane strain.\
$\sigma_{xx} = -300$ MPa, $\sigma_{yy} = 300$ MPa, $\tau_{xy} = 150$ MPa
Isotropic material: $G = 15$ GPa, $\nu = 0.2$, $\alpha = 26\mu/\degree C$, $\Delta T = 75\degree C$