What is the order of passage through this intersection?

• 1Tram 1, tram 2, the red, purple, and green cars.
• 2Tram 2, tram 1, the red, green, and purple cars.
• 3Tram 2, tram 1, the purple, red, and green cars.
• 4Tram 2, the red car, tram 1, the purple and green cars.