Six people, named W, X, Y, Z, T and U, each are of different ages. The age of X is 40. The age of T is two times the age of Z. The age of W is two times the age of U. The age of Z is one-fifth the age of W. The age of X is two times the age of T. If the age of U is one-third the age of Y, what is the age of Y?