During a cooking competition, five chefs: X, Y, Z, W, and V presented their dishes. X presented before Y but after Z. W presented last. What is the correct sequence of presentations?
In a family of six members P, Q, R, S, T, and U, there are two males and four females. P is a teacher. Q is the sister of R. S is the mother of T. U is the father of Q. Who is the male member of the family?
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 after R but before T. What is the correct sequence of tasks?