Extracted text: 6. A cylindrical sample of soil is iso-tropically compressed at 150 KPa under drained condition. Subsequently, the axial stress was held constant and the radial stress was increased to 300 kPa under an undrained condition. (a) Calculate the initial mean effective stress and deviatoric stress. Create a graph with the x-axis as p, p' and the y-axis as q (p, q space). Plot these values in (p, ) space. (b) Calculate the increase in mean total stress and deviatoric stress. (c) Plot the total and effective stress paths (assume the soil is a linear, isotropic, elastic material). (d) Determine the slopes of the total and effective stress paths and the maximum excess porewater pressure for each space.