1. For each of the following concepts, show a real-world example (other than the ones presented in the text or in-class session, give the justification/explanation for each of your examples, and Draw the model).

a N:M recursive relationship

b. an entity that is weak but ID Independent in a relationship (non-identifying R).

c. an entity that is weak and ID-dependent in a relationship (identifying R).

2. Are subtype entities and weak entities the same? Explain with examples.