(Solved): The open ended cylinder below is now a thick-walled cylinder with an internal radius of a=43mm, ...

The open ended cylinder below is now a thick-walled cylinder with an internal radius of $a=43\mathrm{mm}$, and external radius of $b=67\mathrm{mm}$. The force is $P=332\mathrm{kN}$ on the both pistons, each having the same radius as the inside of the cylinder. Determine the maxiumum radial stress in the wall of the cylinder. Express your answer in MPa.