It is "over the mantelpiece." This is because "over" is a preposition that is telling you where the painting is hanging.
LOL I DON'T KNOW I AM IN 7TH GRADE
There is no question but I would like to point out problems with that sentence. Firstly you need a full stop. Secondly make it more engaging and exciting by adding synonyms. Hope this helped
Answer:
The university offers many majors in engineering, such as chemical, industrial, and electrical engineering.
