The reaction described by h2(g)+i2(g)⟶2hi(g) has an experimentally determined rate law of rate= some proposed mechanisms for this reaction are: mechanism a (1) h2(g)+i2(g)−→(g) (one-step reaction) mechanism b (1) i2(g)⥫⥬=−(g) (fast, equilibrium) (2) h2(g)+2i(g)−→(g) (slow) mechanism c (1) i2(g)⥫⥬=−(g) (fast, equilibrium) (2) i(g)+h2(g)−→(g)+h(g) (slow) (3) h(g)+i(g)−→(g) (fast) which of these mechanisms are consistent with the observed rate law?