DIFFICULT (15 POINTS EACH) 5. A concrete dam retaining water shown below. If the specific weight of water is 23.5 kN/m2, find the factor of safety against overturning and the pressure intensity on the base. Assume there is a hydrostatic uplift uplift that varies uniformly from full hydrostatic head at the heel of the dam to zero at the toe of the dam and that the coefficient of friction between dam and the foundation soil is 0.45. 14 mm 1 m -3 m 4 m 7 m 3 m 12 m 18 m 3 m B 777 NINININ 8 m 15 m