a. Describe a MUST constraint. Give an example other than one in this chapter.
b. Describe a MUST NOT constraint. Give an example other than one in this chapter
c. Describe a MUST COVER constraint. Give an example other than one in this chapter.
d. Explain, in general terms, what needs to be done to enforce minimum cardinality
e. Explain the need for each of the actions in Figure 6-28(a).
