A snippet of a use case diagram is shown below. From the diagram, determine the following:

$$ How many types of users are shown, and how would they be classified?

$$ For each type of user, indicate the interactions they will have with the system, based on the diagram.

$$ What kind of system or application might this represent?

$$ What requirements might have been used to generate this use case diagram? List as many as you can think of$.$