Define the following on U= {a,b,c,d,e} with the set A={a,b,c} and the binary operator defined on A, called circle S (please help finial tomorrow and completely lost)

Define the following on U= {a,b,c,d,e} with the set A={a,b,c} and the binary operator defined on A, called circle S (please help finial tomorrow and completely lost)