Answer:
a) Name has nothing to do
b) Youth energy is compared to the energy in an old person
Step-by-step explanation:
a) By the statement "What's in a name" means that family names given to Juliet and her lover by their families have nothing to do with their love and hence irrespective of whatever family name they have they must live together
b) In Act II Scene 5, Juliet gets irritated by the speed with which her old nurse approaches her to tell the good news that Romeo wants to marry her.