Consider enterprise of a medical clinic where we wish to track the level of various substances (for example, cholesterol or alcohol) in the blood of patients. For each bloodsample that is taken from the patient, one test will be performed and the date of thesample, the substance tested, and the measured level of that substance will be recordedin a database.Model the information provided by completing the following steps.1. Start by identifying and describing each class in English. Note, this isfollowing a top-down design where you first model all the objects in theenterprise and then you determine how they interact.2. Continue by drawing the UML class diagram by drawing the classes, butavoid filling in the attributes for now, just name the classes.3. Next, determine what relationships exist between the classes you identified.Draw each association in the diagram including the multiplicity constraintsand describe in English (both directions) to make sure you’ve correctlymodeled the information given.4. Now complete each class by filling in the attributes and their correspondingdata type.5. Map the UML class diagram to the relational model by drawing the relationscheme diagram. Be sure to model all constraints such as any non-nullattributes, primary key, and foreign key.