The Constitution of India has made which of the following provisions to safeguard and ensure the independent and impartial functioning of a high court.

1. They can be removed from office by the president only in the manner and on the grounds mentioned in the Constitution.

2. The retired permanent judges of a high court are prohibited from pleading or acting in any court or before any authority in India.

3. The jurisdiction and powers of a high court in so far as they are specified in the Constitution cannot be curtailed both by the Parliament and the state legislature.

Which of the statements given above is/are correct?