Pre-Equilibria Conditions in Reaction Mechanisms?

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5Br-(aq) + BrO3-(aq) + 6H+(aq) 3Br2(l) + 3H2O(l)

The above reaction is expected to obey the mechanism:

BrO3-(aq) + H+(aq) HBrO3(aq) Fast equilibrium
HBrO3(aq) + H+(aq) H2BrO3+(aq) Fast equilibrium
H2BrO3+(aq) + Br-(aq) (Br-BrO2)(aq) + H2O(l) Slow
(Br-BrO2)(aq) + 4H+(aq) + 4Br-(aq) products Fast
Choose, from the list below, correct expressions for the overall rate law which are completely consistent with the above mechanism.

-d[Br-]/dt = k[Br-][BrO3-][H+]2 ....correct or incorrect?
k[H+][Br-][BrO3-]2 = -d[BrO3-]/dt ...correct or incorrect?
-d[Br-]/dt = k[Br-] ....correct or incorrect?
k[Br-][BrO3-][H+]2 = -d[BrO3-]/dt ....correct or incorrect?
-d[BrO3-]/dt = k[Br-][BrO3-][H+] ......correct or incorrect?
-d[H+]/dt = k[BrO3-][Br-][H+]2 ....correct or incorrect?
 
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