Cumulative projected total mass and stellar-over-total mass fraction profiles. Top: Cumulative projected total mass profiles for the PIEMD (solid black), SPEMD (solid blue), PIEMD+BGG (dashed black), and SPEMD+BGG (dashed blue) models with ±1σ uncertainties (differently hatched shaded areas), as in Fig. 7, compared with the cumulative projected stellar mass profile with ±1σ uncertainties, represented by the dashed light blue curve and shaded area, respectively. Bottom: Cumulative projected stellar-over-total mass fraction profiles, color-coded for each model according to the top panel. In both panels, the vertical lines close to the x axis locate the distances from the lens galaxy center of the different multiple images, color-coded following Fig. 1. The black arrow at R = 9.32 kpc shows the effective radius of the BGG.