Consider the following reaction, \(2H_2(g) + 2NO(g) \rightarrow N_2(g) + 2H_2O(g)\) which follows the mechanism given below: \(2NO(g)\underset{k_{-1}}{\stackrel{k_1}{\rightleftharpoons}} N_2O_2(g)\) (fast equilibrium) \(N_2O_2(g)+H_2(g) \xrightarrow[]{K_2}N_2O(g)+H_2O\) (slow reaction) \(N_2O(g)+H_2(g) \xrightarrow[]{K_3}N_2(g)+H_2O\) (fast reaction) The order of the reaction is________