Determine the volume of air in cubic feet per min at 30C and 100.30 kpa if the boiler efficiency is 73.0% to burn with coal with ultimate analysis C=72.4%, H=12.4%, O= 2.4%, N=0.24%, S=9.24%,Ash=0.24%, Water= 3.08%. The boiler generates 130,000 lbs of steam per hour with a factor of evaporation of 1.30 and excess air of 30%.