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:
| Station Code | Station Name | Arrival | Departure | Platform |
| --- | --- | --- | --- | --- |
| RJPB | Rajendranagar Terminal | Starting Station | 17:35 | 2 |
| PNBE | Patna Junction | 17:50 | 18:00 | 4 |
| MGS | Mughal Sarai Junction | 20:55 | 21:10 | N/A |
| CNB | Kanpur Central | 01:10 | 01:50 | N/A |
| NDLS | New Delhi Railway Station | 08:35 | Destination Station | 15 |
Question:
At what Platform is the Departure 18:00?
Answer:
4.0