Which of the following sets are not well defined? Explain.

**a. **The set of wealthy school teachers

**b. **The set of great books

**c. **The set of natural numbers greater than 100

**d. **The set of subsets of \(\{1,2,3,4,5,6\}\)

**e. **The set \(\{x \mid x \neq x\) and \(x \in N\}\)

In: Advanced Math

Subjects

- Computer Science
- Chemistry
- Advanced Math
- Statistics and Probability
- Physics
- Biology
- Accounting