Help with this assignment for database systems course :

Draw the entities and relationships suggested by each word problem. Include the proper foreign key(s). Remember to make a copy for yourself.

Unary Relationships

1- We run one of the nicest German Shepherd breeding facilities in the southwest region. Each dog has a name that is unique, a basic color and a disposition. We want to keep track of only the most recent breeding mate for any given dog, when they bred, and the litter size. All of our dogs are currently part of a breeding pair.

2- Same as #1, but our dogs often breed repeatedly with the same dog and we dont want to lose any data over time.