During a meeting, five people A, B, C, D, and E speak in the following order: A speaks before B but after C. D speaks after E but before B. What is the correct speaking order?
In a family of five members A, B, C, D, and E, A is a doctor, B is a teacher, C is a lawyer, D is the father of E, and E is a student. Who is the mother?
In a family, there are three children: X, Y, and Z. X is the brother of Y, and Y is the sister of Z. If Z is a doctor, what is X's profession if he is not a doctor?