According to Diane Raymond, what are the three tropes that are prevalent in television sitcom's representation of LGBTQ characters? Why is she critical of these tropes? How do they represent queer sexualities and identities in a way that maintains compulsory heterosexuality (ensure that you explain this concept)? To illustrate your response, draw upon an example from either Ellen coming out episode (found in the Week 6 lecture) or from another 'queer' television sitcom.