Please HELP WITH a CLASS DIAGRAM to describe the objects and attributes needed, and how they relate to each other to track schedules for airplane flights. The flights go between cities. The aircraft...

Please HELP WITH a CLASS DIAGRAM to describe the objects and attributes needed, and how they relate to each other to track schedules for airplane flights. The flights go between cities. The aircraft type that is scheduled for that flight implies the seating capacity. We need to know the seating capacity so that we know how many seats we can sell.