Question: Consider the following class diagram that represents the relationships between people and journals. A person may be one of the contributors or one of the

Consider the following class diagram that represents the relationships between people and journals. A person may be one of the contributors or one of the editors of a journal. Under certain conditions, a person may become a chief editor.

Express the following in OCL:

1 -

A journal must have at least three contributors.

2 -

A person cannot edit a journal to which he contributes.

3 -

A person cannot become chief editor unless he edits at least five journals.

4 -

Post condition of the method Person::edit

(

Journal

)

Consider the following class diagram that represents the relationships between people

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