A factory using a manufacturing process that requires warm conditions needs 10000 m3/hr of Supply air delivered into the building at 30oC, 50% relative humidity. Return air, having been cooled by the manufacturing process is extracted from the building at 19oC. Half of the Return air is expelled as exhaust and replaced by cold Outside air at 7oC, 80%. The remaining Return air and the Outside air are mixed adiabatically in an AHU. The mixture is then heated and humidified to the supply air condition by injecting steam. (i) Use the psychrometric chart to estimate the amount of moisture that must be added to the air. Include a sketch of the whole air-conditioning process on a SKETCH of the psychrometric chart. (ii) If all of the heat required to heat the supply air came from the injected steam, estimate the required temperature of the steam.