Question: (a) In the context of Object Oriented (OO) analysis, outline what a Use Case is. In your answer, identify three roles that use cases play

(a) In the context of Object Oriented (OO) analysis, outline what

(a) In the context of Object Oriented (OO) analysis, outline what a Use Case is. In your answer, identify three roles that use cases play in the implementation of an OO system. [5 Marks] (b) Discuss what an actor is within the context of a use case diagram and illustrate the UML notation that relates to it. [7 Marks] (c) Within a use case diagram, there are relationships that can exist between individual use cases, one is extends the other is includes. Explain what each relationship means, giving an example. [6 Marks] (d) Using an example of your choice, provide a documented use case using the following headings: - Purpose or Intent - High level description - Pre-conditions - Extended step by step description of main flow - Alternative flows (or scenarios) - Post-conditions

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