You have the transient response of a closed-loop system as shown in the figure, the entry being a unit step and the second-order system. Determine: The differential equation corresponding to the open mesh system 1. 2. The transfer function of the open mesh 3. The model in state spaces 4. a representative fluid level system with the values of the corresponding parameters y(t) 1.5 0.5 1 0 0 A INT OUT 5 10 15 20 t [s]