Coming off their Sunday night home win over the Steelers, the Broncos stayed at home for a Monday Night interconference fight with the Green Bay Packers.  In the first quarter, Denver took the early lead with QB Jay Cutler completing a 5-yard TD pass to TE Tony Scheffler.  The Packers would respond with QB Brett Favre completing a 79-yard TD pass to WR James Jones.  In the second quarter, Green Bay took the lead with kicker Mason Crosby getting a 19-yard and a 26-yard field goal. In the third quarter, the Broncos began to rally as kicker Jason Elam got a 45-yard field goal for the only score of the period.  In the fourth quarter, Denver managed to get a last-second 21-yard field goal from Elam to send the game into overtime.  Unfortunately, on the Packers' first play of the period, Favre sealed the win with an 82-yard TD pass to WR Greg Jennings. With the loss, not only did the Broncos fall to 3-4, but it also marked the first time in franchise history that they lost to Green Bay at home.
Question: How many points did the Packers have at halftime?
Answer: 13