2. (7 Pts) The state of plane stress at a point is shown on the element in the figure. (a) Determine the principal stresses and the associated principal planes acting

at this point. (2 Pts.) (b) Determine the maximum in-plane shear stress and the associated orientation of the planes. (2 Pts.) (c) Draw a 2-D element representing the principal stresses, with respect to the element shown. (1 Pt.) (d) Construct Mohr's circle and label the stress states for the elements in parts (a) and (b). (2 Pts.)