If I'm correct in thinking the play is "Romeo and Juliet", then Mercutio is related by being a character in said play. Hope this helps.
Climax is the section of the plot is best represented by the passage above
The doctor tells Macbeth that his wife is very ill, and he cannot cure her. Macbeth reacts angrily, telling the doctor he cannot be bothered by such matters. This is so different than the start of the play when Macbeth and Lady Macbeth are shown as a close, loving couple. We know when Macbeth no longer cares about his wife that he is headed for tragedy
let me do my research real fast and I will let you know what I can find