Inferred past star formation activity for the five star clusters (left panels) and for the CI (right panels). From top to bottom, the best-fit solutions of the UV boosting factor (blue curve) and SFR (green curve); Monte Carlo distribution of the maximum boosting factor with median, percentiles, and fiducial values (see the text for details); Monte Carlo distribution of the sSFR (median, percentiles, and fiducial values follow the same color coding as in the middle panels).