In a group of five friends: Alice, Bob, Charlie, David, and Eva, the following conditions are given: 1) Alice cannot sit next to Bob. 2) Charlie must sit next to David. 3) Eva cannot sit at either end. Which of the following arrangements satisfies all conditions?
A selection of fruits must meet these conditions: 1) Apples cannot be selected if bananas are included. 2) Oranges must be included if grapes are selected. 3) Bananas can be selected only if apples are not selected. Which fruits can be selected together?
A class consists of four students: John, Lisa, Mark, and Nina. The following conditions are given: 1) John is older than Lisa but younger than Mark. 2) Nina is the youngest. 3) Lisa is not the oldest. Who is the oldest student in the class?