Six individuals P, Q, R, S, T, and U are sitting around a circular table facing the center. S is sitting directly opposite to R. R is to the immediate left of Q. T is sitting to the immediate right of Q. If U is sitting directly opposite to Q, then what is the position of P?

Six persons - P through U are sitting around a circular table facing the center. R and T are not adjacent to each other. Q and S are opposite each other. P is sitting to the immediate left of S. Which of the following additional statements is required to get a single definite final arrangement of all persons?

A, B, C, and D are sitting around a circular table facing the center. 1) A is sitting opposite the cook. 2) B is sitting to the immediate right of the barber. 3) The washerman is sitting to the immediate left of the tailor. 4) D is sitting opposite C. What are the professions of A and B respectively?