Which coordinate sysmtem?

Would the following two triple integrals over E be best solved using cartesian, spherical or cylindrical coordinates?

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

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

Would also appreciate reasons for your choice.

Best,
wirefree