Which of the following issues were highlighted in the CAG report on Punjab’s higher education system?

1. Low salaries for assistant professors, with many earning below the prescribed minimum pay.
2. Poor faculty qualifications, with 81% of guest faculty lacking basic UGC-required qualifications.
3. High NAAC accreditation rates, with over 70% of Punjab’s colleges receiving A-grade ratings.
4. Lack of job placement cells, with fewer than 30% of colleges having active career support.

Which of the above statements are correct?