It's not that easy to achieve if you are a beginner, but trust me it's not as hard as you think it is. Let's just say it's not too easy because it takes practice, not because you weren't born with it or because it's impossible but it takes effort and time and you really have to understand. You don't have to go to school, or a professional vocalist instructor to learn how to increase your vocal range. It's not that far away either :)
If you really want to learn, contact me at hello_punkish@hotmail.com