2. Model the relationship between a car (that has an engine and a color) and its owners (having
a name) in a UML class diagram. A car can have several owners over time, but only one or
no owner at a time. Do not forget cardinalities, role names, attributes and their types. [5]
3. In an order management system, the following are the main activities: Create Order, Send
Invoice, Receive Payment, Dispatch Goods, and Close Order. Some of the activities can be
done in parallel (concurrent activities) and other activities require the finishing of other
activities. Draw an activity diagram to model the above activity. Note: We use a tick bar to
represent concurrent activities. [5]