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Project 3.1 For the following truss structure, write a MATLAB program that wil determine the internal forces in the structural members by the method described in Example 3.3. Print out the reactions, the coefficient matrix, the members' internal forces, and a check on the solution. F1s 12 6 bays at 9 ft each Project 3.1 For the following truss structure, write a MATLAB program that wil determine the internal forces in the structural members by the method described in Example 3.3. Print out the reactions, the coefficient matrix, the members' internal forces, and a check on the solution. F1s 12 6 bays at 9 ft each