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:
| Name/Designation | Class | Range (varies with payload weight) | Payload | Status |
| --- | --- | --- | --- | --- |
| Fajr-3 | MRBM | 2,000km | 800kg | Operational |
| Shahab-2 | SRBM | 300–2,000km | 1200kg | Operational |
| Shahab-3 | MRBM | 2,100km | 990kg | Operational |
| Shahab-4 | MRBM | 2,000km | 2,000kg | Under Development |
| Sejil-1 | MRBM | 1,930km | Unknown | Operational |
| Sejil-2 | MRBM | 2,000km | Unknown | Operational |
Question:
What is the range (varies by payload weight) for Shahab-4?
Answer:
2,000km