Directions:- Study the following information carefully to answer the question given below.
Seven friends T, U, V, W, X, Y and Z are sitting in a straight line facing north. W sits fifth to the right of T. W does not sit at any of the extreme ends. Two people sit between Z and X. Y sits third to the left of U. Y sits exactly in the middle. Z is not an immediate neighbour of Y.
If all the seven friends are made to sit alphabetically from right to left positions of how many will remain unchanged?