(Solved): please help im confused Find the normal strain and shear strain components for the given 3-dimensio ...

please help im confused

Find the normal strain and shear strain components for the given 3-dimensional state of stress. The Young's modulus of the material is $E=60\mathrm{GPa}$ and the Poisson's ratio is $v=0.3$. Write out both the engineering and elastic strain tensors (matrices). $[?]=?\begin{array}{ccc}30& 20& ?20\\ 20& 10& ?10\\ ?20& ?10& 20\end{array}?MPa$ Find the normal stress and shear stress components for the engineering strain tensor (matrix) given. The shear modulus of the material is $G=25GPa$ and the Poisson's ratio is $v=0.3$. $[?]=?\begin{array}{ccc}5& ?2& 3\\ ?2& ?3& 1\\ 3& 1& 2\end{array}?\times 10^{?4}\mathrm{mm}/\mathrm{mm}$