develop a use-case diagram for an on-line telephone directory to replace the phonebook that is provided to you by your phone company. The directory should be able to provide phone numbers when presented with a name; it should also list area codes for different parts of the country and generate emergency telephone numbers for your area.

Can you please explain what this diagram is saying? I am confused because some of them has incoming arrows and some has outgoing arrows.

Login Customer Name Customer Number Customer Address USER DATABASE Search Details