How do I change my secret question and answer?

How do I change my secret question and answer?
If you would like to change or update your Password Question and Secret Answer, please send an email to:

For security reasons, we request that you send this information from the Yahoo! Mail account associated with the Password Question and Secret Answer. In the subject of the email, type:

Password Question and Secret Answer

In the text of the email, include:

* Your Yahoo! Mail ID.
* The ZIP code you gave when you registered for the account (non-U.S.residents, please include country).
* Your birth date that you provided at registration.
* The alternate (non-Yahoo!) email address listed for your Yahoo! ID.
* Your current Password Question and Secret Answer (exactly as you entered them at registration).
* Your new Password Question and Secret Answer.

LINK :

Code:
http://help.yahoo.com/help/us/mail/config/config-17.html