Four friends: John, Sarah, Mike, and Lisa, are sitting in a row. John is to the left of Sarah but to the right of Mike. Lisa is sitting at the end of the row. Who is sitting in the middle?
In a family of five members: P, Q, R, S, and T, there are two males and three females. P is a teacher, Q is a doctor, and R is the mother of S. If T is male, who is the father?
Among five animals: Lion, Tiger, Bear, Wolf, and Fox, the following conditions are given: The Lion is heavier than the Tiger but lighter than the Bear. The Wolf is lighter than the Fox but heavier than the Tiger. Which animal is the heaviest?