What is a summary of chapters 90–92?

Chapters 90–92 of Wonder deal with the aftermath of Daisy's death and Olivia's role in the school play. In chapter 90, Auggie ponders life in heaven and if the family's dog, Daisy, is there. He thinks that in heaven, his face won't matter, because Daisy never cared about his face and just loved him for being him.
In Chapter 91, the family goes to see the school play, Our Town. They are surprised when Via steps on stage as Emily, since it was supposed to be Miranda. While Miranda believes she worked hard on the role of Emily, no one in her family is able to come. When she sees that Via's whole family is in the audience, she pretends to be sick and gives the role to Via.
In chapter 92, everyone congratulates Via and Justin for their role in the play. Auggie gets lost in the backstage crowd and begins to panic, but Miranda rescues him. Miranda has always seen Auggie as her little brother, to the point that she developed a lie about him actually being her brother at camp that summer. The act of saving Auggie gives her the opportunity to protect him like a big sister would.