A hospital launches a package deal of immunization plans. A patient has to register with their details at the hospital to avail it. The hospital system fetches the latest immunization plan from the server and creates a specific schedule with due dates and the names of vaccinations customized for the patient. Assume that each patient registers only once. The hospital may update the plan intermittently with the latest available vaccines and create a new plan and schedule for the patient. Draw an E-R diagram linking the patient, the hospital, and the immunization plan. Try to normalize the diagram.