(a) A material is to be dried and has an initial moisture content of 90% to a final content of 10%. If the critical moisture content is 55% and the equilibrium moisture content is 6% (at dryer condition), calculate the saving in drying time if the material is dried to 16% instead of 10%. All other drying conditions remain the same. All moisture contents are on the wet basis. (b) Calculate the partial pressure and specific humidity of air if it relative humidity at 300K and one atm is 70% and if saturated vapor pressure of water at 300K is 0.2463atm [4]