$5.$ A mechanical section under consideration is a hollow square section $(150$ mm x $150$ mm$)$ with awall thickness of $20$ mm$.$ The distance v$2=06,$mm and distance yR $=90$ mm$.$ The length of thebeam is $300$ mm$.$ If the $30$ kN point load is moved along the beam, at what distance from support A would it create the maximum bending moment? Determine the magnitude of the maximum bending moment.Calculate the bending stress at distance y$1$ and y$2.$ Using calculations, determine the shear stress in the side walls at point y$1=40$mm$.$