Extracted text: The soil profile at a site up to a depth of 10 m is shown in the figure (not drawn to the scale). The soil is preloaded with a uniform surcharge (q) of 70 kN/m² at the ground level. The water table is at a depth of 3 m below ground level. The soil unit weight of the respective layers is shown in the figure. Consider unit weight of water as 9.81 kN/m³ and assume that the surcharge (q) is applied instantaneously. q = 70 kN/m² Ground level 3m Sand (Bulk unit weight = 18 kN/m²) V Ground water table 4m Silty clay (Saturated unit weight =20 kN/m³ ) 3m Clay (Saturated unit weight = 21 kN/m³) Boulder clay immediately after preloading, the effective stress (in kPa) at point P and Q respectively, are