Evolutionary stages of our sample. Top: Phase shift of the three central radial modes, ϵ_c as a function of the central large frequency separation Δν_c. Bottom: period spacing ΔΠ₁ as a function of Δν. The stars are colour-coded by their evolutionary stage. Orange, blue, and red circles are RGB, red clump (RC), and secondary clump (2CL), respectively. A star with ambiguous evolutionary stage is shown as a black dot. The grey-background circles correspond to the “golden sample” from CAPASS (Espinoza-Rojas et al. in prep).