Consider the following statements regarding Punjab’s economic challenges and industrial growth:

1. Punjab’s industrial sector is dominated by low-productivity and low-wage manufacturing and service enterprises.
2. Punjab ranks 6th among 17 major states in the NITI Aayog Composite Innovation Index (2021).
3. The Punjab Vision Document 2047 (PVD 2047) provides detailed sector-wise strategies for industrial transformation.
4. Punjab’s investment in science and technology is below 0.5% of its GSDP, lower than most other states.

Which of the above statements are correct?