Calculus 3 question, need help?

(Triple integral) 2xy dxdydz, where T is the solid in the first octant bounded by the coordinate planes and the hemisphere z =√(4 −x^2− y^2). What are the x, y, and z points. The answer is 64/15. Why is that the answer how do you even find these points. I'm so lost, thank you for your time.

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