When using a user variable in MySQL$,$ which of the following are true. $($select all that apply$)$

When using a user variable in MySQL$,$ which of the following are true. $($select all that apply$)$

A user variable is locally available.

A user variable is globally available.

A user variable is available to multiple stored procedures.

A user variable is available to multiple users.

A user variable is available to the current user only.

A user variable is released when the user disconnects.