cylinder #4 misfires, and the code says low coolant as well as O2 sensor on 2004 Chevrolet Trailblazer

I have MULTIPLE DRIVEABILITY SYMPTOMS of CHUGGLE, ROUGH IDLE AND LIGHT OR INTERMITTENT MISFIRE. It feels like the engine is stalling, but it doesn't. also when i ascend up a hill it feels rougher than when i am going down.

What are the code numbers please? I assume one code is P0304 what are the others.