2 Simple Questions

Hello,
i’m working on my custom skin and i;m using the fowling codes to display the categories and monthly archive in my sidebar:

<?php wp_list_categories('show_count=0&title_li='); ?>

<?php wp_get_archives('type=monthly&limit=24'); ?>

My question is how can i also add the number of posts nest to every page/month link?

Example:
Category A
to
Category A (X)
where X is number of posts inside.

Thank You in advance for Your help!