The figure shows a retaining wall constructed on an existing ground where y= 18.0 kN/m and 6' = 36. The wall retains a 4.0 m high backfill consisting of loose sand with y= 18.0 kN/m and 6 = 30. Unit weight of concrete is 24.0 kN/m, and 5=% a. Assuming the soil on the right side of the wall is in active state, determine the magnitude and the location of the active thrust on the wall. b. Evaluate the stability of the wall with respect to sliding and overturning. 2.0 m Loose sand: 4.0 m y= 18.0 kN/m, = 30 Retaining wall 1.0 m Dense sand: y= 18.0 kN/m, 0 = 36