Question 1: Assume that initially A-5 and B:10. The following are 3 transactions on A and B ( denotes assignmen): TI : A+B A: A+B B T2: A+B B: A+B A * For each transaction, a) add necessary read- and write-actions to the computation; b) show the undo/redo-log records for each of the transactions. Question 2: The following is a sequence of undo/redo-log records generated by two transactions, T and U: COMMIT U>: Suppose there is a crash and, upon recovery, the last log record appeared on disk is one of the following four possibilities: (a) (d) For each possibility, to recover from the crash, describe what values written by T and U must appear on disk, and which values might appear on disk. Describe the actions of the recovery manager, including changes to both disk and the log