Question 3: Transactions and Loggings Assume there are three transactions, T1, T2 and T3. The initial value of A is 0. • Tị : A= A +2 T2 : A = A ×2 • T3 : A=A² 1.Suppose the concurrency is enabled in the system, please provide all the possible values of A and the corresponding schedules. 2.Please draw a figure to provide a serializable schedule with 2PL such that the result of this schedule is A = 16. 3.Please draw a figure to provide a NON-serializable schedule with 2PL such that the result of this schedule is A = 0. 4. Please draw a wait-for graph to explain that the above schedule that will generate a deadlock (shared, exclusive locks).

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