Consider the following narrative: A racing association zonal wants to keep information about the various races in a season. Basically you want to record the date of each competition, characteristics of the circuit in which it ran, such as filename, its complexity, and geographical location. You want to record, also general information on the various pilots, cars, and in particular that drove a car broker in a particular competition. This is due to a broker does not necessarily always run with the same car, because the car rider pairing is determined by lot before each competition. With the above information: a) Construct the corresponding DER. b) Include the DD.