Consider the following statements about the law of contempt of court in India:

1. The Contempt of Courts Act, 1971 was enacted based on the recommendations of the Sanyal Committee.

2. The Constitution itself empowers the Supreme Court and High Courts to punish for contempt of themselves.

3. The Constitution itself defines what constitutes 'civil contempt' and 'criminal contempt'.

4. Parliament is competent to make laws regulating the practice and procedure relating to contempt of court.

How many of the statements given above are correct?