Based on parameters such as the materials shear modulus, diameter of the wire, mean coil diameter, and number of active coils (assume 8.75), determine the theoretical spring stiffness and displacement. Compare these values to the FEA results. For the shear stress, consider which component of stress is of interest. (Create a coordinate system to use as the reference for the calculation.) Again, be sure to include a percentage difference for comparison. You performed such calculations during your machine design course and must turn this in as a hand written Homework assignment.