Ammonia, NH3, is used in numerous industrial processes, including the production of pharmaceuticals such as sulfonamide and antimalarials and vitamins such as the B vitamins. The equilibrium equation for the synthesis of ammonia (sometimes known as the Haber process) is N2(g) + 3H2(g) ↔ 2NH3(g). What will happen to the rates of the forward and reverse reactions when a catalyst is added?

Forward rate increases; reverse rate decreases.
Both forward and reverse rates increase.
Both forward and reverse rates decrease.
Forward rate decreases; reverse rate increases.