225- According to the data in the table below, if 855,000 vehicles travel daily in a city, and each vehicle goes and comes back, on average a distance of 50 km is covered, with a catalytic converter installed in the exhaust of the vehicle, the mass of three pollutants entering the air from the exhaust is reduced per day. Under these conditions, what percentage by mass of the exhaust gases will $\mathrm{CO}$ form?
\textbf{225-} According to the data in the table below, if 855,000 vehicles travel daily in a city, and each vehicle goes and comes back, on average a distance of 50 km is covered, with a catalytic converter installed in the exhaust of the vehicle, the mass of three pollutants entering the air from the exhaust is reduced per day. Under these conditions, what percentage by mass of the exhaust gases will $\mathrm{CO}$ form?
\begin{center}
\begin{tabular}{|c|c|c|c|}
\hline
\textbf{Chemical formula of pollutant} & \textbf{CO} & $\mathbf{C_xH_y}$ & \textbf{NO} \\
\hline
\textbf{Amount of pollutant} & \multirow{2}{*}{Without converter} & 6/0 & 1/66 & 1/03 \\
\cline{1-1}\cline{3-5}
\textbf{(g.km$^{-1}$)} & \multirow{2}{*}{Near converter} & 0/6 & 0/06 & 0/04 \\
\hline
\end{tabular}
\end{center}
(1) $74/14$ , $288/4$
(2) $85/71$ , $288/4$
(3) $74/14$ , $319/6$
(4) $85/71$ , $319/6$
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\textit{Calculation space}
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