Which of the following are true about UML Use Case Diagram? i. Document the functionality of the system from the users’ perspective. ii. Does not document back end features performed by the software,...

Which of the following are true about UML Use Case Diagram?

i.                Document the functionality of the system from the users’ perspective.

ii.              Does not document back end features performed by the software, such as ‘recommend shortest route’.

iii.            Only suitable for the development of a prototype.

iv.             Actors can be external systems such as payment gateway systems and printers.

v.              Describe the internal working of the software.