Use MATLAB commands to define the systems in the state-space form and then convert to the transfer function form. Assume that the displacements of the two masses, \(x_{1}\) and \(x_{2}\), are the outputs, and all initial conditions are zero. The masses are \(m_{1}=5 \mathrm{~kg}\) and \(m_{2}=15 \mathrm{~kg}\). The spring constants are \(k_{1}=7.5 \mathrm{kN} / \mathrm{m}\) and \(k_{2}=15 \mathrm{kN} / \mathrm{m}\). The viscous damping coefficients are \(b_{1}=b_{2}=b=250 \mathrm{~N} \cdot \mathrm{s} / \mathrm{m}\).