can you explain it so I can learn how to solve it.

A proposed mechanism for the decomposition of hydrogen peroxide consists of three elementary steps: (1) H2O2(g)2OH(g) H2O2(g)+OH(g)H2O(g)+HO2(g) (3) HO2(g)+OH(g)H2O(g)+O2(g) If the rate law for the reaction is first order in H2O2, which step in the mechanism is the rate-determining step? None of the steps Step 2 Step 3 Impossible to determine Steps 1 and 2 Step 1