A series of tasks were completed in the following order: Task 1, Task 2, Task 3, Task 4. Task 2 was completed after Task 1 but before Task 3. Task 4 was completed last. What is the sequence of tasks?

A. 1, 2, 3, 4

A, B, C, D, and E are five students. A is older than B but younger than C. D is older than E but younger than A. Who is the youngest?

B. B

During a meeting, four participants, M, N, O, and P, spoke in a specific order. M spoke before N but after O. P spoke after N. What is the correct speaking order?

A. O, M, N, P

Five books are arranged on a shelf. Book A is to the left of Book B but to the right of Book C. Book D is to the left of Book E. What is the correct order of the books from left to right?

A. C, A, B, D, E

In a family, there are three children: X, Y, and Z. X is the brother of Y, and Y is the sister of Z. How is Z related to X?

D. SIBLING