Points and green and red curves same as in Fig. 4. The cyan dotted curve shows the case with no merger and a burst of star formation 3 Gyr ago. The magenta dashed curve represents the scenario with multiple bursts at 3 Gyr, 2 Gyr, 1.1 Gyr, and 0.45 Gyr with a duration of 0.5 Gyr each (Massana et al. 2022). The blue solid curve illustrates the aforementioned scenario of multiple bursts with an additional burst 5 Gyr ago (Rubele et al. 2015).