2. [40% ] An element at a point on the plate has the state of stress shown with ox= 100 MPa, oy = 60 MPa, and xy = 40 MPa. (i) Draw a sketch of Mohr's circle with a compass and find the principal stresses acting at this point. In addition, use the equations from the exam aids to verify the graphical results. Draw the element and the principal stresses. (ii) Find the maximum in-plane shear stress at this point from Mohr's circle. In addition, use the equations from the exam aids to verify the graphical results. Draw the element with all stress components and maximum in-plane shear stresses. oy=60MPa 4 Ox=100MPa Txy = 40 MPa