A 600 strain gage rosette is mounted on the surface of a cylindrical pressure vessel with element a aligned with the long axis of the cylinder. After an internal gage pressure p is applied, strains are measured to be a = 114.3 microstrain, b and c = 428.6 microstrain . For the tank material, E = 30 x 106 psi and  = 0.32. a) Find the state of strain (x, x and xy) and the principal strains. b) Using your knowledge of thin-walled pressure vessels, estimate the internal pressure, p.