1.Let A= {a,b,c,d}. Give an example (with justification) of a relation R on A that has none of the following properties, reflexive, symmetric, transitive.

2.Let A= {a,b,c,d}. How many relations defined on A are reflexive, symmetric and transitive and contain the ordered pair (a,b), (b,c), (c,d).

Thank if you can help