Look here for the first hint
Maybe you don’t have all the information on your own. You’ll need each other.
Look here for the second hint
It helps if you draw a table on a piece of paper. Collect all the information to see where it is or is not possible to sit for the family members and Jonathan.
Look here for the third hint
Andrew is sitting in between Hannah and George
Look here for the fourth hint
Benjamin is sitting on chair one