2. A two layer flexible pavement structure is loaded on the surface with 4100 kg whweel load uniformly applied over a circular area of diameter 300mm. The top layer has an Elastic Modulus of 250 MN/m², thickness of 300m and Poisson's ratio of 0.5. The bottom layer has an Elastic Modulus of 50 MN/m² and Poisson's ration of 0.35. Using Boussinesq's single layer theory, calculate, at a depth equivalent to the bottom of top layer in the two layer structure the:- (a) Vertical Stress (b) Radical Stress (c) Maximum Shear Stress (d) Surface Deflection.