Indicate the range of a lower individual impression tray in the case of the well retained mandibular alveolar ridge and the deep floor of the mouth:

1) vestibular margin should extend beyond the neutral zone, passing by the lower labial frenulum and buccal plicae;
2) vestibular margin should reach the neutral zone, passing by the lower labial frenulum and buccal plicae;
3) in retromolar region, it should reach the mandibular tubercule;
4) in retromolar region, it should cover the mandibular tubercule and reach the pterygomandibular ligament;
5) lingual margin is placed above the attachment of the mylohyoid muscle;
6) lingually, it passes by the attachment of the superior pharyngeal constrictor muscle;
7) lingually, it runs along the mylohyoid line to the region of the lingual frenulum which it passes by;
8) lingually, the margin should be extended beyond the mylohyoid line.
The correct answer is: