The state of strain at the point on a boom of an hydraulic engine crane has components of...

The state of strain at the point on a boom of an hydraulic engine crane has components of ϵx = 250(10−6), ϵy = 300(10−6), γxy = −180(10−6). Use the strain-transformation equations to 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 the x−y plane.