1) Draw data models for the following entities. In each case, make certain that you show the attributes and identifiers:

a) Aircraft: An aircraft has a manufacturer, model number, call sign (e.g., N123D), payload, and a year of construction. Aircraft are classified as civilian or military.

b) Car: A car has a manufacturer, range name, and style code (e.g., a Honda Accord DX, where Honda is the manufacturer, Accord is the range, and DX is the style). A car also has a vehicle identification code, registration code, and color.

c) Restaurant: A restaurant has an address, seating capacity, phone number, and style of food (e.g., French, Russian, Chinese)

d) Cow: A dairy cow has a name, date of birth, breed (e.g., Holstein), and a numbered plastic ear tag.