Normalized growth rates η for p and g modes in terms of the pulsation periods corresponding to the selected models. Modes corresponding the δ Sct model are depicted with square symbols and continuous black line, while modes corresponding to the pre-ELM WD model are depicted with circle symbols and continuous red lines. A value of η > 0 (η < 0) implies unstable (stable) modes. In frequencies, the band of excited modes for the δ Sct model is 10.16 ≲ v ≲ 34.56 c/d and for the pre-ELMV model is 17.28 ≲ v ≲ 24.68 c/d.