Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Stations | Place | Managed By | Platforms | Zone |
| --- | --- | --- | --- | --- |
| Waddon Marsh tram stop | Waddon | Tramlink | 2.0 | 5.0 |
| Waddon railway station | Waddon | Southern | 2.0 | 5.0 |
| Wandle Park tram stop | Croydon | Tramlink | 2.0 | 5.0 |
| Wellesley Road tram stop | Croydon | Tramlink | 1.0 | 5.0 |
| West Croydon station | Croydon | Southern / Tramlink | 2.0 | 5.0 |
| Woodmansterne railway station | Woodmansterne | Southern | 2.0 | 6.0 |
| Woodside tram stop | Woodside | Tramlink | 2.0 | 4.0 |
Question:
Name the average zone for waddon marsh tram stop
Answer:
5.0