5. A second order system representing a suspension like in the following figure, has a mass of m=1kg, a spring with stiffness k=4 N/m, and unknown damping coefficient C. k m X Find the damping coefficient of if the only information available is the following plot of its poles: 1.1 0.9 0.8 0.7 U.6 0.5 04 Imaginary Part 0.3 0.2 0.1 0 -0.1 -0.2 E-0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1 -1.1 -1.2 -1.3 -1.4 -1.5 -2.5 -2 -1.5 -1 -0.5 Real Part