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:
| Category | Sub-category | Cab size | Drive wheels | Capacity (litres) |
| --- | --- | --- | --- | --- |
| 1 Heavy tanker | Village | Crew | 4x4 | 3,000 - 4,000 |
| 1 Heavy tanker | Multi-purpose | Crew | 4x4 | 3,000 - 4,000 |
| 1 Heavy tanker | Grasslands | Single | 4x4, 6x6 | 3,000 - 4,000 |
| 2 Medium tanker | Multi-purpose | Crew | 4x4 | 1,600 - 3,000 |
| 2 Medium tanker | Grasslands | Single | 4x4, 6x6 | 1,600 - 3,000 |
| 3 Heavy tanker | Multi-purpose | Crew | 4x2 | 3,000 - 4,000 |
| 3 Heavy tanker | Multi-purpose | Single | 4x2 | 3,000 - 4,000 |
| 4 Medium tanker | Multi-purpose | Crew | 4x2 | 1,600 - 3,000 |
| 4 Medium tanker | Multi-purpose | Single | 4x2 | 1,600 - 3,000 |
| 5 | Super tanker | Crew | 4x4, 6x6 | 4,000+ |
| 5 | Super tanker | Single | 4x4, 6x6 | 4,000+ |
| 6 | Super tanker | Crew | 4x2, 6x4 | 4,000+ |
| 6 | Super tanker | Single | 4x2, 6x4 | 4,000+ |
| 7 | Light tanker | Crew | 4x4 | 800 - 1,600 |
| 7 | Light tanker | Single | 4x4, 6x6 | 800 - 1,600 |
| 8 | Light tanker | Crew | 4x2 | 800 - 1,600 |
| 8 | Light tanker | Single | 4x2 | 800 - 1,600 |
| 9 | "Striker" | Crew | 4x4 | Less than 800 |
| 9 | "Striker" | Single | 4x4 | Less than 800 |
| 10 | Light pumper | Crew | 4x2 | Less than 1,600 |
| 10 | Medium pumper | Crew | 4x2 | More than 1,600 |
| 11 | Medium pumper | Crew | 4x4 | More than 1,600 |
| 12 | Personnel transport | Crew | 4x4 | None |
| 12 | Bus, small | Up to 15 seats | N/A | None |
| 12 | Bus, large | More than 15 seats | N/A | None |
| 13 | Bulk Water Carrier | Most likely single | 4x2, 6x4, 8x4 | 4,000+ |
| 13 | Bulk Water Trailer | Most likely single | N/A | 4,000+ |
| 14 | Tanker trailer, small | N/A | N/A | Less than 800 |
| 14 | Tanker trailer, large | N/A | N/A | More than 800 |
| 14 | Pump trailer | N/A | N/A | N/A |
| 15 | Fire boat | Fire boat | Fire boat | None |
| 15 | Other boat | Other boat | Other boat | None |
Question:
Name the number of cab size for 4 medium tanker
Answer:
2.0