You can choose to do either one of the following two subproblems. (1) For the circuit system below, derive the state space model. Note that the input u is a current, the output y is a voltage, and one of the resistors has a negative resistance -1 ohm. u = iin u(t) b 1F HE 711 w -152 (2) For the mass-damper system below, the input u(t) is a velocity, the three mass elements have the same mass m and velocities V, V2, U3, respectively, the each of the four dampers has damping coefficient b. Suppose the output of the system is the net force F(t) acting on the middle mass element in the rightward direction. Derive the state space model of the system. V(t) 1H m b 1F y 111 b