Consider the following statements regarding the Treaty of Amritsar (1809):

1. It was signed between Ranjit Singh and the British to establish peace in Punjab.

2. Ranjit Singh agreed not to expand his territory south of the Sutlej River.

3. In return, the British recognized Ranjit Singh’s sovereignty over Kashmir.

4. This treaty was brokered by Napoleon Bonaparte’s envoys as part of European diplomacy in India.

Which of the above statements are correct?