select count of 2 events from same column

I am trying to create a query which will return a count of Ys and Ns from one of the columns.
The following statement will return all the Ys but I want a third column to show the Ns.

SELECT DISTINCT a.name, COUNT(b.response)
FROM a,b
where a.id=b.id
AND b.response='Y'
GROUP BY a.name;

How can I modify this query to include a third column with a count of b.response where b.response='N'

Any help would be greatly appreciated.