$($three marks$)$ Examine the reaction mechanism found below:

$2NO(g)N_2{O}_2(g)(fast)$

$N_2{O}_2(g)+H_2(g)N_{2}O(g)+H_{2}O(g)(slow)$

$N_{2}O(g)+H_2(g)N_2(g)+H_{2}O(g)(fast)$

Draw a circle around any reaction intermediates. Draw a box around any species that can be considered a catalyst. Write the rate law for this process in the space below: