Consider the truss structure shown with the following properties: A-3 x 102 m E=70 GPa К 1. Find the element stiffness matrix for each truss 2. Put the element stiffness matrices in global coordinates and find the global equilibrium equation 3. Calculate the displacements at each node. 4. Calculate the reactions at each node. 5. Calculate the internal forces within each bar 50 kN 100 kN 50 kN 2 5 3 m 3 m 3 m