Evolutionary tracks of the stars in the H-R diagram constrained by different observations. The top panel indicates the stellar models of C1, the middle panel those of C2, and the bottom panel those of C3. The observational constraints are effective temperature and luminosity (left panel), added lithium abundance (middle panel), and added rotational rate (right panel) for each star. The solid line presents α = 1.75 and the dashed line presents α = 1.95. The different colors represent rotating models with different initial velocities.