Consider building a tidal barrage along a straight section of beach in California. Assume that the average tidal range is 3 m, with two high tides a day. Assume that the tidal basin is 20 m wide and extends for 1 km along the coast. Assume that all available energy from both incoming and outgoing tides is extracted. Compute the average power output of this installation. Do you think this installation would be worth building?