Provide a separate ER diagram representing each of the following situations.
1.A is an entity. It has an attribute, “a_id” as its identifier. B is a weak entity that depends on A. It has “b_id” as its discriminator. Many instances of B may belong to the same instance of A.
2. A, B, and C are entities. There is a relationship between all three, called D. For each A and B there is one C. For each B and C there can be many A’s. For each A and C, there is one B. Every time the relationship, D, is satisfied, a single value, “Note”, will be stored.
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