During the combustion of gasoline, let us the formula of gasoline is Octane $(C_8{H}_{18}),$ For the combustion of gasoline, Octane, $(C_8{H}_{18})(a)$ complete the chemical equation for the combustion of octane is: $C_8{H}_{18}+z(x{O}_2+yN2)?$ ; if O$2$: N$2=1$:$3\mathrm{.}76$ in molar ratio of air; $($b$)$ From the above equation, calculate how much weight of air is needed for the combustion of $1$ mole of octane to complete combustion; $($for you reference typical Air$/$Fuel Ratio$=14\mathrm{.}7,$ you answer may be slightly different$)$; $($c$)$ the right figure shows the conversion efficiency for the pollutants A$,$ B$,$ C from exhaust out of a gasoline engine pollution control system, what are A$,$ B and C pollutants; $($e$)$ what is the catalysts used in for this engine, and the possible chemical reactions showing the pollutants are removed by the catalysts effectively.