Consider the following two transactions: (SHOW WORK) T13: read(A); read(B); if A = 1 then B := B - 1; write(B). T14: read(B); read(A); if B = 1 then A := A - 1; write(A). Let the consistency requirement be A = 1 or B = 1, with A = 1 and B = 1 as the initial values.a. Show that every serial execution involving these two transactions preserves the consistency of the database.b. Show a concurrent execution of T13 and T14 that produces a nonserializable schedule.c. Is there a concurrent execution of T13 and T14 that produces a serializable schedule?

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.