1. Let A=(4,5,6) and B-(5,6,7) and define R, S, and T as follows: For all (x,y) e AxB, (x,y) ER if x y. (x,y) E x-y Sif is an integer, and T=((4,7),(6,5),(6,7)} 2 a. Draw arrow diagrams for R, S, and T b. Indicate weather any of the relations R,S, and T are functions.