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uestion 4 a) Describe and sketch the five different EC7 failure imit states. (5 marks) b) The Eurocode 7 equation for soil bearing resistance in a long term (effective stress) state is as follows: R/A'= c'Nesebe+qN.s.bola +0.5yB'N, DA Describing different aspects of the equation outline how a ground resistance is derived. (5 marks) c) If the above equation in part a) describes effective situations in short term conditions in cohesive soils the equation modifies to: R./A= (((+2)c.boscie)+qXY Using the above equation in partc) calculate the resistance from the ground in the situation outlined in Fig Q4 assuming the foundation is square. Se can be taken as 1.2. be ke and yw can be taken as 1. (10 marks) 1.4m 0.7m 5m us Clay Cu Y = 110 kN/m2 = 25 kN/m Fig 04 4301CIVH