Problem 1: A site has a wind that blows at a steady 10 m/s for 12 hours and 5 m/s for another 12 hours. Assume a wind turbine with 10 m blades has an efficiency of 0.3. (i) (ii) (iii) Calculate the energy for each 12-hour period and find the total energy harvested for 24 hours. Repeat the calculations for the average velocity of 7.5 m/s for 24 hours. Compare answers in (i) and (ii) and explain the difference.