Based on the narrative in the twelfth chapter of the book, how does Penny show her support for Pop-pop's belief that he is able to talk to Mickey, the nephew whom he lost in the War, through radio static?

Based on the narrative in the twelfth chapter of the book, Penny shows her support for Pop-pop's belief that he is able to talk to his dead nephew, Mickey whom he lost in the War, by sitting with him as he listens to the radio static.