2. (15 points) For Cairo, Egypt in July, the average net radiation is 185 W/m2, the air temperature is 28.5°C, the relative humidity is 55%, and the wind speed is 2.7 m/s at a height of 2 m. Calculate the open water evaporation rate in mm/day using the energy method (E,), the aerodynamic method (E), and the combined method.

Fig: 1