Ok, let's get this out of the way first: the notation of the equation is incorrect. It should either be 8/2(2+2) or 8/(2(2+2)) or (8/2)*(2+2). This is why there is so much confusion. There are 2 ways to solve this problem: PEMDAS or BODAS. Depending on which part of the world you're from, you will get a different answer:
So, technically, you're all correct.