How do I make my Q and As private?

I tell my story here a lot, as it seems appropriate, to answer questions posted...My story is about how I was delivered from actual, physical blindness when I first stepped foot on the property of a Greek Orthodox Church when I was young and looking...

...I checked her profile and her q&a list is private...I want my q&a to be private as well...somebody please tell me how this is done.

Hey guys I'm curious, on your profile how do you make your Q+A's private? I've seen a few profiles like that, but I can't figure out how to do it on mine!

When people go to your profile, and you can see what questions they ahve answered/asked but on some it says "so-and-so's q/a are private" How do you make it like that?

I would like to make my Q&A private when people click on my name; how can I do that? Thanks.

I noticed that on some peoples profiles it says that their Q' excetera are private. How did they do that? I can't figure out how!

I don't want my e-mail contacts viewing my Q & A. How can I make it completely private?

I noticed that some users have their questions and answers marked as private. How do you change your setting to private? Thanks!

Let me know please if you can help coz I can't find out how to change my Q&A's to private.