Scarlet Pimpernel, writing homework help: The Mystery Unfolds, questions 4,5

The Mystery Unfolds, questions 4,5:
4. The author writes that Sir Percy is playing second fiddle to his wife “with imperturbable bonhomie.” What does that French term imply about him?
5. When the Vicomte challenges Sir Percy to a duel, Marguerite responds with this sarcasm: .. Nook on that pretty picture—the English turkey and the French bantam.” About what features of each is she poking fun?