Air at a dry bulb temperature of 28 0C and a relative humidity of 68% is heated to a dry bulb temperature of 98 0C. The hot air is passed through a bed of carrot at an initial moisture content of 85% w.b. for drying. The air exits the dryer at a dry bulb temperature of 52 0C. If the dryer produces 120kg product per hour at 12% w.b. moisture content. Determine the (a). Mass flow rate of dry air in kg/h (b). Heat supplied by the heater in kW