These are calculus problems I\'m working on, but can\'t figure out how to do

. I left my book at school, so I\'m in kind of a tough spot. Any help would be great:
- Evaluate the surface integral of the function g(x,y)=x^2+y^2 on the hemisphere x^2+y^2+z^2=1; z=>0
This is what I\'m working on now. Please, someone help?
