Answer:
1: Either she was crazy from the split in her family, or she was really hot in the cattle car and saw fire.
2: I really don't remember this part :(
4: It showed how good a secret the camp was, because no one who went there ever came back
5: It foreshadows the brutal torcher that the jews would face later on in the book
Sorry I couldn't answer these as well, I got to do my own HW!