A long rigid cylinder with radius a was coated with an elastic material with elastic modulus of100 GPa and Poisson's ratio of 0.25 was subjected to hydrostatic pressure p. If

the radius of the rigid cylinder is a and the coating thickness is t, use the Airy stress function to determine the followings: a) Stress components at the interface r = a b) Maximum and minimum values of o, that may occur at the interface for different coating thickness t.