An electronic instrument, of mass 20 kg, is to be isolated to achieve a natural frequency of 15 rad/s and a damping ratio of 0.95. The available dashpots can produce a damping constant in the range 10 N-s/m to 80 N-s/m. Determine whether the desired damping ratio can be achieved using a passive system. If a passive system cannot be used, design a suitable active control system to achieve the desired damping ratio.