calculus 3 I just want the final answer just to double check before submitting my homewrok

Q1-Use spherical coordinates to find the volume of the indicated region.

the region enclosed by the conez²=x²+y²between the planesz=2and z=9

Q2-Use cylindrical coordinates to find the volume of the indicated region.

the region enclosed by the paraboloids z=x²+y²-2andz=198-x²-y²

Q3-Find the unit tangent vector of the given curve.

r(t) = 12t⁴i- 4t⁴j+ 3t⁴k