correct!

incorrect! the correct answer is "neither". note that is not in the set. so it's not reflexive.

2) {(x,x), (y,y)} = reflexsive

incorrect! reflexive and transitive.

3) {(x,x) , (y,y), (z,z), (x,z)} = reflexsive

correct!

4) A^2 = reflexsive, symmetric, transitive

incorrect! symmetric and transitive but not reflexive.

5) 0 (empty set) = neither (im not sure on this one)

incorrect! transitive.

6) {(x,y), (x,x), (x,z)} = reflexsive