Which of the job titles in A on the vocabulary section would best describe the following?

1. The person who represents the workers’ interests in disputes with the management in a factory. union representative
2. A person who has a high position in a company and whose job it is to make important decisions.
3. An important person in a company who sits on the board.
4. A worker whose job requires no special training, for example, an office cleaner.
5. A person generally in charge of the day-to-day organisation of a company/department.
6. A person whose job it is to keep an eye on the day-to-day work of other workers.