Read the scenario carefully. After tapping "Done Reading", answer the deduction questions.
A family has 5 members: John, Mary, David, Emily, and James. They are planning a vacation to a theme park. John and Mary are the parents, and David, Emily, and James are their children. The family wants to ride the new roller coaster, which has a height restriction of 48 inches. David and Emily are both under 48 inches tall, while James is exactly 48 inches tall. John and Mary can ride with any of their children. However, the roller coaster car can only hold 4 people at a time, and each car must have at least one adult. The family wants to make sure that all 5 members can ride the roller coaster, but they can only ride it twice.