Question #3 (25 Marks): A stepped bar is made of a material having Young's modulus E = 200 GPa. It is subjected to an axial load of F = 35 kN, as shown in Figure 3. Draw an equivalent finite element model using spring elements. Determine the nodal displacements, reactions, and stresses in the elements. A = 400 mm, A = 300 mm^2, A = 200 mm.
Figure 3: [Insert the figure here]