Queues can be setup for which objects? (check all that apply)

Which of the following is Not a Mandatory Field while creating a User Record?

Recent Items use the?

Multiple record types may be created for every tab, with the exception of

Org wide default is set to private. Kathy is assigned US Sales Director role with access rights to view opportunities owned by other users associated to her accounts. Jennifer is assigned EMEA Rep Role and Phil to US rep role. Which business opportunities can Kathy VIEW and EDIT?