Thread: About system tables

I have two questions related to system tables in PostgreSQL:

1. Is there any method to get names of defined functions (and their
properties) from system tables using SQL statements ?

2. How to receive (using SQL statement on system tables of course) list of
users who have SELECT/INSERT/UPDATE/DELETE/RULE rights on certain database
object (let's assume on a table named X)

    Thank you
    Mike