On a grap paper draw the mohr's circle of stress for a uniaxial test and two triaxial test in which the maximum sustained loads were 10,000lbfs , 20000lbsf and 35000lbsf respectively. confining pressure in the triaxail test were 1,000psi and 5,000psi respectively. all test specimens were 1.5 inches in diameter and 3 inches long. the failure angles were 22.5 , 32 and 34 degree respectively compute the shear stress on the ultimate failure planes.