The section of a reinforced concrete retaining wall is shown in the figure below. There is a surcharge load of 12 kPa at the surface of the backfill. Data: Unit wt of concrete = 23.5 kN/cu.m. Unit wt. of soil = 17.0 kN/cu.m. Angle of internal friction of soil = 35 degrees Coefficient of friction between concrete and soil = 0.50 Allowable soil bearing capacity = 200 kPa Minimum factors of safety for stability: Sliding = 1.50 Overturning 2.0 = Use: U 1.2 DL+ 1.6 LL U 1.2 D+ 1.6 (H+L) 1. Determine the stability factor of safety against overturning. 2. Calculate the factored moment at the wall.