uml - Use cases Extends and include - Stack Overflow

I have a not completed diagram of e-commerce order I am not sure of the include and extend relatationship Does this diagram is correct for the attached flow

requirements - Are using <> and <> relationship

Use case generalization versus extension - Stack Overflow.pdf

Use case generalization versus extension - Stack Overflow.pdf

Is my use case UML diagram too complicated? - Software Engineering

uml - Use Case Diagram having trouble with extends and includes in

include - Use case diagrams use of <> - Stack Overflow

uml - Use case generalization versus extension - Stack Overflow

include or extend in UML? - Stack Overflow

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