A person wishes to build a WS (diversion-type) small hydroelectric system on his property. To measure the speed of the water, he dropped a ping-pong ball in the river and found the ball to travel 10m in 4s. He also selected a turbine with a sweep diameter of 0.8m. Assume that the coefficient of performance is 30%, the turbine efficiency is 90% and the efficiency of the generator is 96%. Compute the output power of the plant and the energy generated in 1 year. If the price of the energy sold to the neighboring utility is $0.06/kWh, compute the annual income from this small hydroelectric plant.