Item $3($a$)$ Use Case Diagram:

$$ Draw a use case diagram only for these requirements: $$browse products by category$,$create a user account$,$personalise level of service access$,$personalise level of service support$,$ and $$provide feedback on the service$.$ You need to read the part of Case $1$ that is about requirements related to B$2$C customers.

$$ There is no template or prescribed way of drawing a use case diagram. A relevant use case diagram is only based on the requirements above.

$$ You do not need to draw any subject boundary for drawing this use case diagram.

$$ All use cases should be in one use case diagram. Consider $$Purchase online$$ as the start point $($as the starting use case$)$ in your diagram. Each of the above four use cases becomes a branch of $$Purchase online$$ and may have sub$-$branches. Pay attention to $$and$$ and $$or$$ words in the requirements in Case $1,$ as they indicate the need to use $$includes$$ and$/$or $$extends$.$

$$ Each use case should start with a verb and should be between one to five words $($usually$,2-3$ words$).$

$$ To draw the diagram, you can use Lucidchart, Draw.io$,$ Signavio or any other software that you prefer. For use case diagrams we usually suggest Lucidchart or Draw.io

$$ To answer this question well, watch the lecture recordings, prepare the first draft of your answer before attending your tutorial, show it to your tutor during the tutorial to receive feedback and to improve it$.$