Would the following twotriple integralsover E be best solved using cartesian, spherical or cylindrical coordinates?

1) $\displaystyle (y^2.z^2) dV$ where E is bounded by the paraboloid $\displaystyle x=1-y^2-z^2$ and the plane $\displaystyle x=0$

2) $\displaystyle y.z dV$ where E lies above the plane $\displaystyle z=0$, below the plane $\displaystyle z=y$, and inside the cylinder $\displaystyle x^2+y^2=4$

Would also appreciate reasons for your choice.

Best,

wirefree