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

1. Modeling Systems - Threat Modeling [Book]

Not sure if my UML USE-CASE diagram is correct - Stack Overflow

uml - Extend in use case diagram - Stack Overflow

uml - Extend in use case diagram - Stack Overflow

Use case generalization versus extension - Stack Overflow.pdf

uml - Can a use case use both extend and include? - Software

Use Case Diagram Relationships Explained with Examples - Creately Blog

Design a Library Management System

Mining Architecture Tactics and Quality Attributes knowledge in

Developer-Led Landscape: Complexity, Automation & A Future of

uml - How to depict several sub-options in use case diagrams

uml - What's is the difference between include and extend in use

requirements - Are using <> and <> relationship