<em>basically im is used for not and here impossible means that anything which is not possible .. here main root or word is Possible because im is only a prefix .. this prefix 'im' changes the meaning of possible and makes it impossible :)</em>
Answer:
Lady Capulet - mother of Juliet
Friar Laurence - adviser to Romeo
Paris - suitor of Juliet
Mercutio - friend of Romeo
Tybalt - cousin of Juliet
The correct pronoun and its use is: I; Subject. I hoped I helped u