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A triaxial compression test on a cohesive sample cylindrical in shape yields the following effective stresses:

Major principal stress=8mN/m$^{2}$

Minor principal stress=2mN/m$^{2}$

Angle of inclination of rupture plane is 60$^{\circ}$ to the horizontal. Present the above data by means of a Mohr's circle of stress diagram. Find the Cohesion and angle of internal friction.