Please help me in the following I couldn't answer this as my teacher taught us only unary We would like to design a database to maintain information about hospital staffs, including doctors and nurses, and patients at the hospital. The information we need includes: • Staff, including their names, addresses and social-security numbers. • Patients, including their names, addresses, and the name of their insurance company. • Patients are each assigned to a ward (room). • Those staffs who are nurses are assigned to zero or more wards. Each ward has at least one nurse assigned. • Those staffs who are doctors are assigned to zero or more patients. Patients may or may not have a doctor assigned, and they may have more than one doctor. Patients in the same ward may have different doctors but will always have the same nurse(s). Specify an entity-relationship diagram for this database. Don't forget to underline key attributes and include arrowheads indicating the multiplicity of relationships. I need help on this. I will post my work based on my analysis here in 1 hour