9. Which of the following are true about the UML use case diagram? i. It is a behavioural diagram. ii. Describe the structure of the software. iii. Illustrate the interaction between actors and...

9. Which of the following are true about the UML use case diagram?

i.                It is a behavioural diagram.

ii.              Describe the structure of the software.

iii.             Illustrate the interaction between actors and objects.

iv.             It is not an object-oriented software modeling approach.