1- The truss system is given in the Figure 1. Find; a) degree of freedom of the system; b) member stiffness matrices for local and global axis; c) global displacements of joints; d) member forces. Additionally, solve the system using Truss MDM program (file is given in the classroom and Sap2000. Then, compare your results. E-200GPa, A-1000 mm² 6m. 4 m E 5m -10 kN CB 3m 2m 3m