Five tasks P, Q, R, S, and T need to be completed. Task P must be done before Q and R. Task S must be done before T. Task R must be done before T. What is the correct sequence of tasks?
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?
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 right of Book A. Book E is at the leftmost position. What is the order of the books from left to right?