Give the critical analysis of Nerrisa in the play "The merchant of venice"(2 to 2.5 pages)

Please use the following points to frame your answer. 

• Nerissa is Portia's lady-in-waiting and her confidant.
• She listens to Portia whining about her perfect life.
• Nerissa mocks at Portia when the latter says that she is tired of her perfect life. 
• Nerissa is a wise and a patient friend of Portia. 
• She thinks that Portia's father must have thought well of her when he decided to set the casket test for Portia's suitors.
• When Portia sets out disguised as a male lawyer to save Antonio, Nerissa accompanies her disguised as the lawyer's clerk.