Use Foreign Keys Relations Create Alter Relations Implement Foreign Keys Q37288667

How and where can you use foreign keys in these
relations? Create / alter the relations so that they
implement foreign keys.

Mall Relation Set Accounts( aid: integer, balance: double, type: String [type must be one of credit, checking, or cash ] Customers( name: String, address: String, aid: integer) Employees( eid: integer, name: String, position: String, salary: double)

OR

 

OR