A pavement has a 10 inch slab with a poisson ratio of 0.36. The pavement is on a base which has a modulus of subgrade reaction of 250 pci. A 17,000 lb corner load is applied (al is 7 inches). Using the revised Westergaard equations, find the modulus of elasticity of the pavement if a corner deflection of 0.05 inches is observed.