Friends, I am doing HeadFirst questions and I found few answers are in correct. I searched and found same problem raised by another PMP aspirant.
The 1st and 3rd questions are wrong here at http://pmzilla.com/questions-headfirst-share-your-thoughts-pls question 2nd is also not satisfactorily.
Harwinder, I want to trust your answer although, the above links are what I am thinking too. Other experts can also share their viewpoint