LetRbe the relation defined byaRb,bRc,cRd,aRc, andbRd.

LetRbe the relation defined byaRb,bRc,cRd,aRc, andbRd.
a) Draw the graph ofR.
b) IsRa function?
c) Name two possible domains forR; name two possible ranges.
d) What is the smallest setSsuch thatRis a relation onS(i.e., the domain and
the range can both beS)?