
Explanation:

Reference:
Box 1: One-to-many relationship
Each educator can have 0, 1, or many qualifications
Box 2: One-to-many relationship
Each educator can be the primary educator for 0, 1 or many cources.
Box 3: Many-to-many relationship that uses a custom table.
Note: N:N (Many-to-Many): A table relationship that depends on a special Relationship table, sometimes called an Intersect table, so that many rows of one table can be related to many rows of another table.
Reference:
https://docs.microsoft.com/en-us/powerapps/maker/data-platform/create-edit-entity-relationships