A rubber ball is inflated to a pressure of 65kpa. At that pressure, the diameter of the ball is 240 mm and the wall thickness is 1.25 mm.The rubber has a modulus of elasticity E of 3.6 MPa and a poisson's ratio of 0.48. Determine the maximum stress and strain in the ball. If the strain must be limited to 0.425, find the minimum wall thickness of the ball. (E=36)