A 5 m high smooth vertical wall retains a clay backfill with c' = 10 kN/m2, o' = 25°, and y = 19.0 kN/m. If the clay is in active state, determine the following a. The maximum tensile stress within the clay b. The depth of the tensile cracks c. The magnitude and location of the active thrust, neglecting the tensile zone

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