Question: 1 . ( 1 0 marks ) Answer the following questions. ( a ) ( 4 marks ) In ER modelling of constraints on binary

1.(10 marks) Answer the following questions.
(a)(4 marks) In ER modelling of constraints on binary relationship types, there are two labelling options discussed in the lectures, i.e., the cardinality ratio together with the existence dependency con- straint, and the (min, max) notation. Describe the two labelling mechanisms as well as the difference between them?

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