Q2 (5 marks). The state of strain at a point on a shaft has components of Ex = 250 10-6, &y= 300 x 106 and Yxy = -180 10-6. Using Mohr's circle, determine a) the in-plane principal strains and b) the maximum in-plane shear strain and average normal strain. In each case, specify the orientation of the element and show how the strains deform the element within x-y plane.