Nine individuals - Z, Y, X, W, V, U, T, S and R - are the only candidates, who can serve on three committees-- A, B and C, and each candidate should serve on exactly one of the committees.
Committee A should consist of exactly one member more than committee B.
It is possible that there are no members of committeeC.
Among Z, Y and X none can serve on committee A.
Among W, V and U none can serve on committee G.
Among T, S and R none can serve on committee C.
In case T, S and X are the only individuals serving on committee B, the total membership of committee C should be:
