What is the best method for monitoring Group Replication conflict resolution?

The MySQL installation includes the mysql_config_editor utility for managing login paths stored in a .mylogin.cnf file.
Which two are true about the login path feature? (Choose two.)

You inherited a busy InnoDB OLTP Instance with 100 schemas and 100 active users per schema.
Total dataset size is 200G with an average schema size of 2G.

The data is transient and is not backed up and can be repopulated easily.

Performance and responsiveness of the DB is paramount.

The query pattern for the DB instance is split 90/10 read/write.

DB host is dedicated server with 256G RAM and 64 cores.

One of your colleagues made some recent changes to the system and users are now complaining of performance impacts.
Which four configuration file edits might your colleague have performed to cause the negative DB performance? (Choose four.)

Consider the table people with the definition:

The application uses a query such as:
SELECT * FROM people WHERE YEAR(Birthday) = 1980;
The query is not using an index.
Which two methods can be used to allow the query to use an index?

Examine the mydata table and SELECT statements:

You issue:
mysql> begin;
mysql> update mydata set a=0 where b=3;
How many rows are now protected by locks with the default InnoDB configuration?