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**WannaBe** Let A be the region that in space bounded by the balls:

$\displaystyle x^2 +y^2 + z^2 =1 $ , $\displaystyle x^2 +y^2 +z^2 =4 $ , above the plane $\displaystyle z=0$ and inside the cone $\displaystyle z^2 = x^2 +y^2 $.

A. Write the integral $\displaystyle \int \int \int_{A} f(x,y,z) dxdydz $ in the form:

$\displaystyle \int \int_{E} (\int_{g^1(x,y)}^{g^2(x,y)} f(x,y,z) dz) dxdy $ when :

$\displaystyle A=( (x,y,z) | (x,y) \in E, g^1(x,y) \le z \le g^2(x,y) ) $ ...

B. Find the volume of A (not necessarily using part A).

Hope you'll be able to help me in this... I think the main problem is that I can't figure out how A looks like... There is also a hint that one of the functions g1 or g2 should be defined at a split region... I can't figure out how this cone looks like and how I can describe A as equations ...

Thanks in advance!