Underground soil profile of a ground is shown in figure. a.) Calculate and plot the variation of total stress (o), pore water pressure (u) and effective stress (o') at points A, B, C and D. b.) Please calculate the values of total stress, pore water pressure and effective stress at the center of the clay layer. c.) If the water table rises to the top of the ground surface, what is the change in the effective stress at the center of the clay layer? 5 ft 30 ft 10 ft 3 ft I d = 110 pcf Coarse Sandy = 55 pcf e = 1.0 w = 5% Ground water table Silty sand Clay Td = 100 pcf 7sat = 115 pcf Ysat = 121 pcf