Average light fractions due to stars in different age and radial ranges. Each panel corresponds to a galaxy merger (first and second rows), and the comparison Sbc/Sc galaxies are shown in the third row. The three bar chart histograms in each panel correspond to different galaxy regions: the inner region R< 0.5 HLR (left bar); the whole galaxy R< 2 HLR (central bar); and outer regions 1 <R< 1.5 HLR (right bar). Colours represent the different age ranges.