e$)$ Assume the stresses calculated at $E$ in part $($c$)$ are ${}_x$ and ${}_{xy}$ on a plane with $=0.$ Determine the normal and shear stresses if the element is rotated $45$ counterclockwise. $[8$ pts$]$

f$)$ Using Moher's circle, determine the maximum shear stress at point $E$ and the orientation of the plane acting on it$.$ You need to draw Mohr's circle and show the angle of the plane where the maximum shear stress is acting. $[8$ pts$]$

Figure $6$