d$)$ Calculation of ${}_{\text{m}\text{a}\text{x}}$ using the classical equation for shear stress due to shear loading in a rectangular cross$-$section.

Compute percent difference between ${}_{xy}$ using the classical equation and the finite element solution of part $($b$).$ Compare stresses at the center pointalong that edge.

Compute percent difference between ${}_{xy}$ using the classical equation and the finite element solution of part $($c$).$ Compare stresses at the same location on the model.