Read the given information carefully and answer the following questions.

Five coaching classes - P, Q, R, S and T, are located on five different floors 1, 2, 3, 4 and 5, but not necessarily in the same order. Each coaching class teaches only one subject among Physics, Chemistry, Mathematics, Biology and English, but not necessarily in the same order. The following information is also known:

Biology subject is taught in coaching class S, while English subject is not taught in coaching class Q.

Coaching class R is on the third floor, and Chemistry subject is taught in coaching class P.

Physics subject is taught in the coaching class located on the fifth floor.

English or Physics subject is not taught in the coaching class located on the third floor.

On the basis of the given information, tell on which floor Mathematics subject is taught?