We consider the angular response to a unit step input force f(t). we observe that the unit step response θ(t) is oscillatory with the following properties: i) the angular displacement θ(t) reaches a maximum value θmax = 6 deg ii) the angular displacement θ(t) converges to a steady-state value θss = 4 deg when t → [infinity]. using this information, determine the values of the mass m and the rotational damping coefficient br.