A spray dryer receives distillers dried grains (DDGS) with a 65% moisture content. The spray dryer operates with dry air entering at 180 °C, 1 bar, and moist air exits at 87 °C, 1 bar, and 25% relative humidity. The volumetric flow rate of the exiting air is 310 m3/min. The solids exit the dryer completely dry. Determine

 a. The rate of dried particle flow, in kg/min

 b. The volumetric flow rate of inlet dry air, in m3/min