Same as Figs. 3 and 4 but for line ratios with CO. In contrast to the previous figures, the colorbar spans a larger range of 1.5 dex, centered on the average line ratios (Table 2), and we add line ratios in pixels with nondetections. Since we show the logarithmic line ratio, negative values that arise from negative noise cannot be shown in either the spatial map or the histograms. We mark pixels where CO is significantly detected, but the line ratio cannot be shown in logarithmic scaling in dark gray. The contours depict integrated N₂H⁺ emission at 0.75 and 3 K km/s.