A sample of clay (Sample A) is isotropically normally consolidated to cell pressure of 400kPa and v0 = 2.052. A second sample (Sample B) is istropically consolidated to 863kPa and allowed to swell to a mean effective stress of 40kPa when v0 = 2.052. Both samples were then subjected to standard undrained compression tests. The value of the soil constants for clay are M = 0.95,Gamma = 3.15 and lambda = 0.19 Find pore pressure at failure of each sample.