Consider the Nordex 1.3 MW, 60-m diameter, wind turbine with operating conditions and output power given in the table below, located in an area with 8 m/s average wind speeds. a. Find the average power in the wind (W/m2 ) assuming Rayleigh statistics. b. Create a spreadsheet determine the energy delivered (kWh/yr) from this machine. c. What would be the average efficiency of the wind turbine? d. If the turbine’s rotor operates at 70% of the Betz limit, what is the efficiency of the gearing and generator?