Consider a DBMS using write$-$ahead logging with the STEAL and NO$-$FORCE buffer pool management policy. The log contains update records, checkpoints, and transaction begin$/$commit$/$abort records. Assume the DBMS executes a non$-$fuzzy checkpoint, where all dirty pages are written to disk. Its update record has the following form:

Assume the DBMS uses the ARIES recovery protocol.$$The database has three transactions $($T$1,$ T$2,$ T$3)$ on three data objects $($A$,$ B$,$ C$).$ The following image has a table shows the log records available on disk after a crash:

Q$4)$What should be the correct action on T$1$ when recovering the database from WAL?

Question $4$ options:

redo all of T$1\text{'}$s changes

undo all of T$1\text{'}$s changes

do nothing to T$1$

Q$5)$ What should be the correct action on T$2$ when recovering the database from WAL?

Question $5$ options:

redo all of T$2\text{'}$s changes

undo all of T$2\text{'}$s changes

do nothing to T$2$

Q$6)$ What should be the correct action on T$3$ when recovering the database from WAL?

Question $6$ options:

redo all of T$3\text{'}$s changes

undo all of T$3\text{'}$s changes

do nothing to T$3$

Q$7)$ Assume that the DBMS flushes all dirty pages when the recovery process finishes. What are the values of A$,$ B$,$ and C after the DBMS recovers the state of the database?

Question $7$ options:

A$=33,$ B$=6,$ C$=42$

A$=13,$ B$=66,$ C$=67$

A$=13,$ B$=6,$ C$=100$

A$=13,$ B$=7,$ C$=67$

A$=71,$ B$=20,$ C$=42$

A$=33,$ B$=42,$ C$=100$

A$=71,$ B$=7,$ C$=100$

A$=13,$ B$=42,$ C$=67$

A$=33,$ B$=20,$ C$=43$

A$=71,$ B$=66,$ C$=32$

A$=13,$ B$=42,$ C$=42$

Not sure

please provide the complete answer