XMM-Newton spectral fits of our extended emission Regions 1 through 4. Each panel shows the EPIC spectrum with the most counts along with additive components of interest for clarity. The black data points and associated solid lines are theobservational spectra and best fit model, respectively. The magenta lines show the unresolved SNR, XRB, and SSS component (see Sect. 2.3.1 for descriptions), blue solid lines represent the M31 ISM component with the dashed blue lines indicating the contamination of smaller regions by larger extended emission regions, that is Region 5 components in Regions 2 and 3, and Region 7 component in Region 4 (see Fig. 8). Best fit parameters are given in Table 2. More detailed plots are presented in Fig. B.1.