Hello!

I need help with the following task:

∫∫∫ z/(1+x^2+y^2) dxdydz

D

where D is: {(x,y,z); x^2+ y^2+z^2 equal to or less than 1, z equal to or bigger than sqrt(x^2 + y^2)}

I think I need to introduce polar coordinates, but I don't understand which limits to set..can someone please help me with this? I am preparing for an exam next week and really need some guidance.

Cheers!