Air containing 0.012kg water vapour per kg dry air is heated to 320K in a dryer and passed to the lower shelves. It leaves these shelves at 70% relative humidity and is reheated 320K and passed over another set of shelves, again leaving with 70% relative humidity. This is again reheated for the third and fourth sets of shelves after which the air leaves the dryer. On the assumption that the material in each shelf has reach the wet bulb temperature and that heat losses from the dryer can be neglected, determine: i) the temperature, wet bulb temperature and humidity of the material on each shelf (and submit together the humidity chart showing these values) ii) the rate of water removal if 6m3/s of moist air leaves the dryer