Answer
4. The family feud drives the lovers' actions by creating obstacles and forcing them to keep their love a secret, leading to impulsive decisions and ultimately tragedy.
5. The Friar thinks Romeo has spent the night with Rosaline, indicating that Romeo has a history of infatuation and impulsiveness in his romantic pursuits.
5. Mercutio's lack of affiliation with either family may symbolize his neutrality and rationality in the midst of the feud, making his death all the more tragic and senseless.