Table:
text: List of railway stations and tram stops in Croydon
C
C
Stations Place Managed_By Platforms Zone_
Centrale tram stop Croydon Tramlink 1 5
Church Street tram stop Croydon Tramlink 1 5
Coombe Lane tram stop Addington Tramlink 2 6
Coulsdon South railway station Coulsdon Southern 2 6
Coulsdon Town railway station Coulsdon Southern 2 6

Question: Which zone among train and tram stops in Croydon, C is the lowest when managed by Southern and has platforms under 2?

Question: From the list of train stations and tram stops in Croydon, C, what would be the highest platforms for the central tram stops?