Unfortunately, there are no A/C vents in the rear seating area.
As a former automotive climate control engineer, I can tell you the absolute best way to get air to the rear passengers is to aim the two outboard front A/C vents high and wide, so the air from them passes over your outboard shoulders. Surprisingly effective for the rear passengers. That leaves the two inner vents for the driver and front seat passenger). As each of the four vents (or as we call them, registers) are individually controllable for air flow and direction, you should be able to keep 4 people more or less comfortable. Don't forget, too, to understand the differences in ECO and COMFORT climate control settings. You can also use the manual climate control air mode selector to route 100% of the air to the A/C registers (rather than floor vents or defroster). In moderate temperatures, the system splits the airflow between various outlets.
2012 Crystal Red / Black, #10,860, delivered Dec 14, 2011.