Pressuremeter tests carried out at 2 m below ground level (bgl) and at 7 m bgl in a firm clay found the total horizontal stresses to be 52 kPa and 108 kPa, respectively. The water table measured in an adjacent piezometer is at 3.5 m bgl. The mass density of the clay was found to be 2.0 Mg/m3 . Determine the coefficient of earth pressure at rest K0 at each of the two depths. For simplicity, the clay can be considered saturated throughout due to capillary rise but do not consider capillary stresses in your calculations