This video explains how you can convert an Entity Relational diagram into the Relational Data Model.
Link to conversion guide: https://spangsberg.net/dl/FromERToRelationalModel.pdf
PLEASE NOTE at
11:00: The conversion of the multi-valued attribute of the Department is NOT being correctly mapped in the video. departmentID should be put as a Foreign Key on the Locations table and together departmentID and locationID form the combined Primary Key as specified in the conversion guide.