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The follow questions refer to the transaction schedule below. TIME 1 2 VALUE of QUANTITY 50 50 3 TRANSACTION Transaction1 Transaction2 Transaction1 Transaction2 Transaction1 Transaction2 ACTION Read Quantity Read Quantity Quantity = Quantity + 35 Quantity = Quantity - 30 Write Quantity Write Quantity 4 5 85 5 6 a. Assuming that there is no locking protocol being applied, what will be the value of Quantity at Time = 6? b. If the two-phase locking protocol was applied, and Transactionl commenced prior to Transaction2, what would be the value of Quantity following the complete execution of both transactions? c. Using the transaction above as an example, explain the concepts of Atomicity and Isolation