A square footing 2.2x2.2m is located at the depth of 1.8m below ground layer in sandy soil. Calculate the safe bearing capacity and safe load footing can take under following cases: Loose sand with Y = 16kN / (m ^ 2) phi = 20 deg Dense sand with r = 21kN / (m ^ 3) Phi = 35 deg What type of shear failure is expected in each case and why? Bearing capacity factors may be assumed as below: