1 Modelling (12p) The domain to model is courses, exams, and exam questions: A course has a code and a number of credits. The code identifies the course uniquely. A course can have many exams, on different dates. Each exam has a total number of points. Each exam has a set of questions, identified by a question number. Each question has a topic and a maximum number of points. Each exam is held in one or more rooms. Rooms have unique names. Each room has a number of seats. a. Draw an Entity-Relationship diagram for this domain. Do not use multi- valued attributes. (ip)