Extracted text: Plane Stress In the stress element given in Figure 3, WITH MOHR CIRCLE; (a) Determine the principal stress directions by calculating the principal stress values. (b) Determine their direction by calculating the largest and smallest shear stresses. Please specify. t (kg/cm?) Ox (kg/cm?) O: (kg/cm²) ox (kg/cm2) T (kg/cm2) t (kg/cm2) 1720 570