Stellar abundances for our stellar sample where we have colour-coded the stars belonging to each population. (a): [Mg/Fe] as a function of [Fe/H]. (b): [Mg/H] as a function of [Fe/H] for the same stars as in the top panel. We also show the linear fit between [Mg/H] and [Fe/H] for each population which was used to determine all the other elements except for He. The fit slope (k) and intercept (m) for the full sample are shown in the bottom right. In both panels, the dashed black line shows the fit when considering the entire stellar sample.