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 but after Q. What is the correct sequence of tasks?
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?
Five students, P, Q, R, S, and T, presented their projects in a seminar. P presented before Q but after R. S presented after T. What is the correct order of presentations?
From a set of items: P, Q, R, S, and T, the following selection rules apply: 1) P cannot be selected if Q is selected. 2) R must be included if S is included. Which of the following selections is valid?