The state of stress at a point is given by:

\[ \sigma_{x}=-150 \mathrm{MPa}, \sigma_{y} 250 \mathrm{MPa}, \tau_{x y}=100 \mathrm{MPa}(\mathrm{ccw}) \]

Draw the Mohr's circle and determine

(a) the principal stresses and principal planes,

(b) the maximum shear stress and its planes, and

(c) draw the orientation of principal and maximum shear stress planes on the stress element.