Which O2 sensor is this?

[Back2Mustangs]

These are all the codes my computer is throwing...I'm putting the MIL's in this week so P0420/30 will be going bye bye, but which one of the front O2 sensors is Bank No. 2? Passenger or Driver side?

P0153 Upstream Heated Oxygen Sensor circuit Slow Response - Bank No. 2

P0420 Catalyst System Efficiency below Limit - Bank No 1
P0430 Catalyst System Efficiency below Limit - Bank No 2

 

[MT1083]

bank 2 is driver side

 

[Red2000GT]

He's right. I found out the hard way.