With five weeks to go in the 2011 regular season, two teams can clinch postseason berths this weekend.

And if you need more than two guesses, you haven’t been paying attention.

The 11-0 Packers will win the NFC North with a victory over the Giants and a loss or tie by the Lions, who face the Saints. The Packers also win the division with a Detroit loss and a Bears loss to the Chiefs.

Finally, the Packers can wrap up the division with a tie and a Bears loss or tie and a Lions loss.

At a minimum, a victory by Green Bay clinches a wild-card berth. Green Bay also wraps up a playoff appearance with a tie and a Bears loss or tie, or with losses from the Bears, Falcons, or Lions, or if both the Saints and Falcons play to a tie.

It’s far simpler for the 49ers. They win the NFC West with a win or a tie. The 49ers also win the division with a loss or tie by the Seahawks and a loss or tie by the Cardinals.