In a family, there are three sons: X, Y, and Z. X is the eldest son and Y is the youngest. Z is the only son who is married. If Z has two daughters, what is the relationship of Y to Z's daughters?
Four friends, A, B, C, and D, are sitting in a row. A is to the left of B but to the right of C. D is not at either end. What is the correct order from left to right?