Five tasks P, Q, R, S, and T need to be completed. P must be done before Q but after R. S must be done before T. What is the correct order of tasks?

B. R, S, P, Q, T

In a group of five friends: Alice, Bob, Charlie, David, and Eva, Alice is taller than Bob but shorter than Charlie. David is shorter than Eva but taller than Bob. Who is the tallest among them?

C. CHARLIE

Five people P, Q, R, S, and T are sitting in a line. P is to the left of Q but to the right of R. S is to the right of T. Who is sitting at the extreme left?

C. R

A, B, C, D, and E are five students who submitted their projects in the following order: A submitted before C but after B. D submitted before E but after A. What is the correct submission order?

A. B, A, C, D, E

Three friends X, Y, and Z have different pets: a dog, a cat, and a bird. X does not have a dog. Y has a bird. Who has the cat?

C. Z