5. (25%) You were given the following unit impulse response of a system. Knowing that the system model could be a first-, second-, or third-order, (a) Treat the system model as a single-degree of freedom second-order mass-spring-damper system, determine the system parameters (static sensitivity, natural frequency, and damping ratio) and settling time. (b) Propose a method to justify if the model is second-order (both in time and frequency domains!)