Solve the following problems involving combustion of fuels. 1. An 8-kmol water gas has the following composition: 25.6% CO, 32.6% H2, 8.6% CH4, 7.2% C2H6, 13.2% C2H4, 6.1% CO2, 0.6% O2, & 6.1% N2. Find the (a) theoretical air needed using 2 methods; (b) the % excess air if 2000 kg of air used. What are the (C) HHV & (d) LHV of the water gas expressed in (1) MJ/kmol; (2) cal/mol; (3) BTU/lbmol