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Find reactions, member forces, and displacements at all joints. Form the structure stiffness matrix for the truss. Use the partitioned matrix to compute the displacement of all joints and reactions. Also compute the bar forces. Area of bars 1 and 2 = 2.4 in², area of bar 3 = 2 in², and E= 30,000 kips/in².

Fig: 1

Fig: 2

Fig: 3

Fig: 4