3. Figure below, shows a mechanical vibratory system represented by the following transfer function. X(s) 1 P(s) ms² + bs + k When a step input p(t)= 2u(t) (i.e., 2 lb force) is applied to the system, the mass oscillates, as shown in the graph below. Determine m, b, and k of the system from this response curve. The displacement x is measured from the equilibrium position. [30] ww m P(2-lb force) x(t) b x (a) 0.0095 ft 0.1 ft 0 1 2 3 4 5 t (b)