or
or
Given that Helal, Xony, and Labu are already seated, the only options left are Faiz, Zafar, Viki, and Tinku.
Based on the information given, we don't have any constraints that directly tell us who must sit in the 7th position. Therefore, any of Faiz, Zafar, Viki, or Tinku could potentially sit in the 7th position.
