Question: 3. (a) Explain the terms actor, use-case and system boundary. (b) Describe 4 use-cases and draw a use-case diagram of a self-scanning system in a

3. (a) Explain the terms actor, use-case and system boundary. (b)

3. (a) Explain the terms actor, use-case and system boundary. (b) Describe 4 use-cases and draw a use-case diagram of a self-scanning system in a shop. A self-scanning system allows a user to scan bar codes of all articles, and deduct the sum from the customer's shopping account. Special solutions apply to alcohol, tobacco and non-packaged articles, such as, vegetables Draw one use-case diagram of a web-based bookstore, for instance Amazon, with two different actors and two different use-cases. Both actors shall be humans and have an association to at least one use-case. (c)

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