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please use irish eurocode
2. (a) A retaining wall 6 m high with a vertical back supports a cohesionless soil with a dry unit weight of 16 kN/m, a saturated unit weight of 19.62 kN/m' and an angle of friction of 35º. The surface of the soil is horizontal and at level with the top of the wall. Neglecting wall friction, determine the total active earth thrust of the wall per lineal metre, and the height above the base of the wall at which the thrust acts. Use the following equations to answer both questions: (50 marks) ona Ka = ка o Kp op oy Ka 1 - sind 1+ sino кр 1 + sino 1 - sind I (b) For the wall described in the previous question, assume that due to poor drainage the water table rises to 2.5 m below the surface. Determine the new determine the total active earth thrust of the wall per lineal metre, and the height above the base of the wall at which the thrust acts. (50 marks) Total marks for question 2 100 marks