Consider the following statements regarding the pardoning powers of the President of India under Article 72:

1. The President has the power to grant pardons even in cases where the punishment is imposed by a military court-martial.

2. The President can exercise the pardoning power without the advice of the Council of Ministers.

3. The power of pardon extends to cases involving the death sentence.

4. The Constitution of India prescribes a fixed time frame for the President to decide on a mercy plea.

Which of the statements given above is/are correct?