Resolving many to many relationships?
If i rightly assume that you are trying to convert the E-R diagrams to relations (tables), then the procedure to convert a many-to-many relationship into relations is to create one more table, apart from the 2 tables that you will create for the 2 entities (waiter-drinks and waiter-shirt). This new table created for the relationship will have its attributes (columns) as the PKey of the constituting entities. In your case, this table will contain 3 attributes; namely waiter_number, drink_number and shirt_number.

Had you been working on a one-to-one or one-to-many relationship, you would augment one more column to the table on many sides instead of creating another relation.