Write a text-only description, then draw the corresponding diagram,

{CREW, SPACESHIP, MISSION}

Your model must include:

For each of the regular entities on your list, include an identifier, plus two more attributes. You must

include at least one of each of the following attribute types in your model: composite, multivalued, and

derived.

One associative entity (should logically come from your description).

One weak entity (think of a new entity to add to your scenario that could work, or interpret an existing

entity as weak).