Consider the following statements on judicial activism in India.

1.       It occurs mainly where the legislature and executive wings of government fail to discharge their duties under the Constitution.

2.      Justice A.H. Ahmadi had initiated judicial activism by converting letter written to him by an aggrieved citizen into a public interest litigation 

3.       Most of the cases of judicial activism have occurred through appeals against lower court judgements

4.       In Judicial activism, the court monitors the development of a case during the trial period and gives necessary directions to investigating agencies.           

  Which of the statements given above are correct?