In 9-33, determine whether the given relation is reflexive, symmetric, transitive, or none of these. Justify your answer.

Let A = R × R . A relation F is defined on A as follows: For every ( x 1 , y 1 ) and ( x 2 , y 2 ) in A,
( x 1 , y 1 ) F ( x 1 , x 2 ) ⇔ x 1 = x 2 .