How to see explain plan in iseries - DB2 Database

[kamal1108]

Am using a IBM iseries DB2 database which is configured in AS400 machine.
am connecting data studio to connect to the database.
Here am not sure of,
a. How to see the explain plan for the query to find the bottleneck of the slowness.
b. What are the privilages I need to see the explain plan for the query.

Thanks,