Question

Where Have You Gone, Charming Billy?

Answer 1

Here are the answers to the given questions above. 
1. What Paul Berlin's memories and fantasies reveal about his family is that, they were close and loving. The answer for this would be the third option.
2. Berlin can't stop laughing at the thought of Charming Billy dying because it was ironic that Billy would die of a heart attack in a war. The answer would be the second option.
Hope this helps.