Answer:
1. Information Technology
2. Manufactoring
3. Law, Public Safety, and Security
Step-by-step explanation:
Information Technology IT usually involves using technology to solve problems which fits Mel's job description. 
Putting together car engines comes under manufactoring because it is a widely used product that needs to be widely manufactored. 
Being a judge in a local court means that you are concerned with the public law and safety because you convict people who are in breach of the law. 
Hope this helped!