Bunch of Codes...New catalytic converter?

[cca6164]

Hi all, long time reader of the forums...first time posting. I have a 2006 X5 3.0 throwing 5 different codes: P0313, P1092, P0135, P0420, and P0430. I was aware of some emissions issues, but have been pushing them off until now…months before inspection of course. From my brief research on the forums it appears it could be a combination of a failing catalytic converter and o2 sensors. I have such an array of codes I thought a new post would be more sufficient than trying to piece together other peoples issues. If I need to replace a catalytic converter how do I know if it’s the front one or the rear one? Is the misfire related to the lean code? Exhaust/emissions isn’t my strongest area of knowledge so dumb it down for me please. I figured the first step would be replacing all 4 of the relatively cheap o2 sensors. Those are ordered and should be installed next week. Any other help is greatly appreciated!

P0313: Misfire detected with low fuel
P1092: Pre catalyst fuel trim system too lean bank 2
P0135: o2 sensor heater circuit bank 1 sensor 1
P0420: Catalyst system efficiency below threshold bank 1
P0430: Catalyst system efficiency below threshold bank 2