A class has students: John, Sarah, Mike, and Lisa. The selection criteria are: John is not allowed to be selected with Mike. Sarah can only be selected if Lisa is also selected. Who can be selected together?
In a group of five friends: Alice, Bob, Charlie, David, and Eva, Alice is taller than Bob but shorter than Charlie. David is shorter than Eva but taller than Bob. Who is the tallest among them?
In a family, there are four members: a father, a mother, a son, and a daughter. The father is older than the mother, the mother is older than the son, and the son is older than the daughter. Who is the youngest in the family?
In a family of six members A, B, C, D, E, and F, there are two males and four females. A is a teacher, B is a doctor, C is the mother of D, D is the son of E, and F is the sister of A. How many males are there in the family?