ERD diagram needed. Design a database to store details about US presidents and their term in office. You are required to record the sequence of presidents so that the predecessor and successor of any president can be determined. Grover Cleveland had nonconsecutive terms, so your model must handle this situation (hint: think of Presidency as an entity). Cleveland was both the 22nd (1885-89) and 24th (1893-97) President of the US. Also, record the fact that the sons of two Presidents (Adams and Bush) have also been Presidents (i.e., there is a father-son relationship between some presidents).