Its a tough one, but it is till possible.
Detroit: 1-6
Win all remaining division games (GB-2, Min-1, Chi-2) 5-0
Lose to Buffalo, Beat NYJ, NYG, Jax, Car. 4-1
Gets us to 10-7 with a 5-1 division record.
Minny: 6-1
Was - W, Buff-L, Dal-L, NE-L, NYJ-W, Det-L, Ind-L NYG-W, GB-L, Chi W - 4-6
Puts them at 10-7 with a 4-2 division record
GB: 3-5
They can go 5-4, or even 6-3 they just have to beat Minny and lose to us twice.
Puts them at 8-9 or 9-8.
Chi:3-5 they can go 5-4 or 6-3, but lose to us twice. 8-9 or 9-8
There, season fixed. Easy-peasy.