Practice Exercises

1. BahamaLetterGrade - Represents a letter grade as assigned in the Bahamas universities. Source: http://en.wikipedia.org/wiki/Letter_grade
2. Feedback – Represents an opinion rating as feedback, where 1 is "no opinion", 2 is "strongly disagree", 3 is "disagree", 4 is "agree, and 5 is "strongly agree".
3. HazardousMaterial – Represents the six hazardous material codes of 'A' through 'F'.