Which mechanism below is a valid mechanism for the reaction shown above? Explain your answer. Mechanism 1 Step 1: 2NO(g)N2O2(g) Step 2: N2O2(g)NO2(g)+O Step 3: NO(g)+ONO2(g) Mechanism.2 Step 1: NO(g)+O2(g)NO3(g) Step 2: NO(g)+NO(g)2NO2(g) YOUDO: 1) Write the overall reaction for the mechanism shown below, and then identify any catalysts or intermediates. Step 1: 2N2O(g)N4O2(g) Step 2: N4O2(g)2N2(g)+O2(g)