Hello, I've got a problem which I am just stuck with..:

[Triple integral]D x^2+y^2 dxdydz, where D: 0<=x^2+y^2<=z^2 , 0<=z<=1

I have tried with spherical coordinates and other stuff(/tricks). I think my problem maybe is in dealing with the intervals. Could somebody please help me with at least some hints?

Sorry if there is something missing in my post. This is my first post on this forum. hehe

Thanks in advance!