In the structure shown, rigid blocks are connected by linear springs. Imagine that only horizontal displacements are allowed. Write the global equilibrium equations \([\mathbf{K}]\{\mathbf{Q}\}=\{\mathbf{F}\}\) after applying displacement boundary conditions in terms of spring stiffness \(k^{(i)}\), displacement DOFs \(u_{i}\), and applied loads \(F_{i}\).

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1 k(1) www. k(3) k(2) www 3 F3 k(4) www. u1 F2. 2 u2