Effect of concentration on rate How do I solve this question?

My thinking is this: since O2 is not a reactant in any step, and since the reaction rate depends only on the reactants, increasing the concentration of O2 does not affect the rate of the reaction.

Is my thinking correct?
Question is solved. Poutnik taught me to do it using steady state approximation :)


Just adding the image for somebody who might find this in future.