Seven 203 staC members including Tom, John, Stewart and Sophia are to go on a trip. The van that they will be taking has 2 seats in the front (including the driver), 2 in the middle, and 3 in the back. How many ways can they be seated (safely and legally) if: (a) Tom and Sophia cannot drive (b) In addition to (a)'s restriction, someone from John, Stewart or Sophia needs to sit in the passenger's seat (the one next to the driver at the front) to help give directions to the driver