i just purchased a 97 camaro rs ttop and i have a few questions.

there is a check engine light on and i am told it is an o2 sensor

how many o2 sensors do these cars have and what are there locations.

and also while im at it i might be doing some exhaust work as i hear some rattling and not sure how good the cat and such is.

am i better off doing this all at once because i may go for a cat delete and the o2 setup would be different and what do i need to have no codes.

I AM A CAR GUY AND A MECHANIC I JUST AM NEW TO CAMAROS ( 3 MUSTANGS)