Finish #2 seed and play #7 Green Bay:
--Beat Detroit OR Philadelphia loses to Washington

Finish #3 seed and play #6 seed:
--Lose to Detroit AND Philadelphia beats Washington.

#6 seed can be either San Francisco or LA Rams:
--San Francisco will be the #6 seed if the LA Rams beat Arizona AND San Francisco loses to Seattle.
--LA Rams will be the #6 seed if the LA Rams lose to Arizona OR if San Francisco beats Seattle.

(Note: Seattle is guaranteed to have a better record than the LA Rams and cannot be the #6 seed.)