Consider the following statements regarding the decline of the Mughal Empire in India:

1. Bahadur Shah Zafar depleted the military and financial resources of his empire by fighting a long war in the Deccan.

2. Post Aurangzeb there was a gradual shifting of political and economic authority into the hands of provincial governors, local chieftains.

3. The ruler of Iran, Nadir Shah plundered the city of Delhi in 1739.

Which of the above statement are correct?