Which two statements are true about InnoDB data-at-rest encryption? (Choose two.)

The data in this instance is transient; no backup or replication will be required. It is currently under performing.
The database size is static and including indexes is 19G.
Total system memory is 32G.
After profiling the system, you highlight these MySQL status and global variables:

The OS metrics indicate that disk is a bottleneck. Other variables retain their default values.
Which three changes will provide the most benefit to the instance? (Choose three.)

You are backing up raw InnoDB files by using mysqlbackup.
Which two groups of files will be backed up during a full backup? (Choose two.)

Examine this statement, which executes successfully:

You want to improve the performance of this query:

Which change enables the query to succeed while accessing fewer rows?

Which two are contained in the InnoDB system tablespace (ibdata1) by default? (Chose two.)