Why ?? relation r is not transitive

xample: 3 Let A [, 2,3, 4] and R bie a relation in A given by R = {(1, 1), (2, 2), (3, 3), (4, 4), (1, 2), (2, 1), (3, 1), (1, 3)}. Then, Ris (a) reflexive (c) transitive