One petrochemical-based industry in Terengganu sent a tanker containing a mixture of hydrocarbon- based mud with an amount of 2500 kg per tanker to a scheduled waste incinerator. The mud contains 10 wt% of 2,4-dibromotoluene (CyH6Br2, MW = 249.93), 10 wt.% of 1,3-dinitrobenzene (C6H4N204; MW = 168.12), 5 wt% of dichlorophenylarsine (C6H5AsCl2; MW = 221.93), 25 wt.% of sand and impurities and the remaining are water. Answer the following questions. (Given molecular weight: CO2 = 44.01; H2O = 18.02; HBr = 80.91; HCl = 36.46; Air = 29.00; As2O3 = 197.84, NO2 = 46.00. a) Determine the amount of all components in the hydrocarbon-based mud and write the possible reactions involved in the incineration process assuming the metal element in the mud is converted to metal oxide. [Marks: 4] b) If all the products generated from the reactions including high volatility metal oxide compound coming out in the stack gas, evaluate the composition (mol%) of the stack gas after the completion of the incineration process based on dry basis with 30% excess air supplied to the incinerator for high efficiency incineration process. Explain why the stack gas is typically calculated as a dry basis and how to obtain the dry stack gas in terms of unit operation