The soil water characteristics curve of a soil sample is shown in the following figure. According to consolidated drained tests on saturated specimens of this soil, the shear strength parameters are obtained: c' = 10 kPa and '=35. Calculate the unsaturated shear strengths of the soil for the following matric suctions: 40 kPa, 120 kPa and 240 kPa. Degree of Saturation (%) 100 90 80 70 60 50 40 30 20 10 0 10 100 Matric Suction (kPa) 1000 10000