title: ER Diagram (Drawing)
body: <p><br>For a relational database that represents the current term enrollment at a large university, what is the ER diagram for a schema that takes into account all the assertions given: </p>
  
  <p>• 100 instructors, 200 courses, and 800 students. <br>
  • An instructor may teach one or more courses in a given term
  (average is 2.0 courses).<br>
  • An instructor must direct the research of at least one student
  (average = 2.5 students).<br>
  • A course may have none, one, or two prerequisites (average = 1.5
  prerequisites).<br>
  • A course may exist even if no students are currently enrolled.<br>
  • Each course is taught by exactly one instructor. <br>
  • The average enrollment in a course is 30 students. <br>
  • A student must select at least one course per term (average = 4.0
  course selections). <br></p>
  
  <p>I have attempted several times to arrive at the answer, but I cannot. All help is valuable to me. I will greatly appreciate an MS Visio diagram (if time can be spared on this question) to help me visualize the solution.</p>
  
  <p>NOTE: I am not looking for RTFM responses.</p>