Cumulative projected total mass profiles for the PIEMD+rc model with point-like (solid black) and extended source (red) modeling, with ±1σ uncertainties (shaded areas), obtained by modeling the multiple images of A, B, and C. For the extended source modeling, the uncertainties are smaller than the linewidth. The vertical lines close to the x-axis locate the distances from the lens galaxy center of the different multiple images, color-coded following Figs. 1 and 6. The black line shows the effective radius of the main lens galaxy.