Following is a series of acid–base reactions that represent the individual steps in a known organic transformation, the replacement of —Br by —OH at a carbon bearing three alkyl groups. Considering only the forward direction, classify each reaction as a Brønsted acid–base reaction or a Lewis acid–base association/dissociation. Classify each labeled species (or a group within each species) with one of the following terms: Brønsted base, Brønsted acid, nucleophile, nucleophilic center, electrophile, electrophilic center, and/or leaving group. For Brønsted acid–base reactions, show the conjugate acid–base pairs.

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CH3 16 H₂C-C-Br: 7 T CH3 A CH3 H₂C-C+* I CH3 B CH, H T ↳ H₂C-C-0- │ CH3 E H T :O-H D :OH₂ F CH3 H₂C-C+ T CH 3 C B :Br: CH, H H₂C-C- I CH3 E CH, H T T H₂C-C- O: + H-OH₂ + I CH3 G H (3.16a) (3.16b) (3.16c)