a. Obtain the global stiffness matrix [K] of the assemblage shown in Figure P2-1 by superimposing the stiffness matrices of the individual springs. Here k1, k2, and k3 are the stiffnesses of the springs as shown.
b. If nodes 1 and 2 are fixed and a force P acts on node 4 in the positive x direction, find an expression for the displacements of nodes 3 and 4.
c. Determine the reaction forces at nodes 1 and 2.
Figure P2-1

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