3. The wind speed is 10m/s at a height of 100 meters above the ground. Estimate the wind speed at a height of 10 meters, assuming the following terrain: (a) Calm water; (b) Heavily wooded country; (c) Large city with many tall buildings. 7. The NEG Micon 54/1000 wind turbine has following specifications: Rotor diameter: 54m Rated power: 1000kW Cut-in wind speed: 4m/s Rated wind speed: 14m/s Cut-out wind speed: 25m/s If the wind follows Rayleigh statistics with an average speed of 10.0m/s, compute the following: (a) Hours per year that the wind is below the cut-in speed; (b) Hours per year that the wind exceeds the cut-out speed; (c) Annual energy generation at rated power