Assume you have the following schedule. Transaction T Transaction T Transaction T3 read item (Y); read item (Z); read item (X); write item (X); write item (Y); write item (Z) read item (Z); read item (Y); write item (Y); read item (Y); write item (Y); read item (X); write item (X); A. Draw serializability graph. B. State whether it is serializable or not, and why. C. If the schedule is serializable, write down the equivalent serial schedule.