Top panel: magnification factor as a function of velocity for the emission lines of CO, H₂O, and H₂O⁺, and indicated for the two dust components (the legend at the top left corner indicates the line and point style for each component of emission). Bottom panel: a comparison between the integrated spectrum of the observations and lens-model reconstructed data seen in the image plane. The filled regions show the model reconstructed using the bins in the image-plane spectra, while the histogram lines show the observed image-plane spectra (see the legend at the top left). The model overall predicts very well the spectra in the source plane.