II. Determine whether each pair of serializations are in conflict equivalence. If not indicate the conflicting operations. a) H1 R(x), R2ly), Wa(y), Ra(z), W2ly), Walz), R2(z), W2(z) H2 R2ly), R(x), Ra(z), W(y), Wa(z), R2(z), W2ly), W2(2) b) H3Rx), Raly), Rs(2), Wato), Wa(z), Ratz), Ws(x), Rly), Waly), W(y). H4 R1(x), R2(y), W2(x), Ralz), Rly), R2(z), Ws(x), W(2), Wly)), Wzly)