Which o2 sensor to change?

I have a 96 Avenger ES. The check engine light came on so i took it to Auto Zone to have a FREE computer check and it came back with the o2 sensor code. There is 4 of them, 2 for each side of the motor. The print out states...o2 sensor #2 in bank 1. States bank 1 is where cylinder 1 is. My questions is which side of the motor has cylinder 1? Is it the the side of the motor that is closest to the front of the car or is the the side closest to the firewall? Any help is greatly appreciated.

Thanks,
Jason :banghead:

I believe that would be the rear.