The facility must treat 12000 kg/min water. The density of the water (salt water) is 1060 kg/m^3. Reverse osmosis membranes will be used to remove the NaCl. The salt concentration is 11.7 g/liter NaCl, the average water temperature is 17 degrees Celsius, and the applied pressure from pumps will be 8 atm. K for the membrane is 230 liters/m^2 hr.atm. If hollow fiber membrane modules can be purchased as units with surface area of 200 m^2 each, specify the number required. For every 5 membrane units online, a 6th is being regenerated (hints: calculate the feed water flux rate; based on the mass flow rate and the feed water flux rate, calculate the total area of membrane needed; based on the area of membrane needed, calculate the total number of membrane unit, using the given surface area for every membrane unit).