Consider the following statements about the impact of Mahmud of Ghazni’s invasions on Punjab:

1. Mahmud of Ghazni invaded India 17 times, and his attacks weakened the Rajput and Hindu Shahi rulers of Punjab.

2. The destruction of temples and plundering of wealth significantly impacted Punjab’s economy and religious institutions.

3. After Mahmud’s death, Punjab was annexed by the Ghurids under Muhammad Ghori without resistance.

4. Mahmud’s invasions paved the way for the establishment of permanent Muslim rule in Punjab.

How many of the above statements are correct?