How many people are standing between A and D (Note: All are standing in a straight line facing north)?

Statement I: K stands second from the left end of the line. Only four people stand between K and T. Y is an immediate neighbour of T. A stands second to the right of Y. As many people stand between K and D as between A and D.

Statement II: A stands second from the right end of the line. Z stands third from the left end of the line. D stands exactly in the centre of the line. As many people stand between A and T as between D and Z.