Condition a>b So

Assume a={1,2,3,4,5}

Then Relation will be

R = {(2,1), (3,1), (3,2), (4,1), (4,2), (4,3), (5,1), (5,2), (5,3), (5,4)}

It is not Symmetric.

For Symmetric (2,1) is in R but (1,2) is not. Simmilar (3,1) is in R, but (1,3) not.

Formula: If (x,y) in R tthen (y,x) must be in R.