2) If a team in this group has a B score of 7 points, its record is 2 wins 1 0 draw and 0 loss.

So team b must win team a, that is, the loss of team a is against the loss of team B.

So, A won the other two teams, and B did not lose to the other two teams.

So the other two teams can get four points at most.

Ensure qualifying

3) If the group scores a maximum of 6 points.

Then it is possible that the records of team B and team C are both 2 wins and 0 draws 1 negative.

That is, a may win b, d,

B won c, d,

C won a and d.

A can't guarantee qualifying.

This is a small score.