I'm having trouble with the following problems:

1.) Find the volume of the region bounded by the paraboloids z = 2x^2 +y^2 and z= 12 -x^2 -2y^2

2.) Find the volume of the region bounded above by the spherical surface x^2 + y^2 + z^2 = 2 and below by the paraboloid z = x^2 +y^2

Can someone give an explanation of what the boundaires would be for triple integration in cylindrical coordiantes