Find the Mass of the Solid Whose Density Is Equal $z = 4$

Multiple Choice

Find the mass of the solid whose density is equal to twice the distance from the origin, which is below the plane $z = 4$ and above the cone $z ^ { 2 } = x ^ { 2 } + y ^ { 2 }$ and the xy plane.

A) $\frac { 8 } { 3 } \pi$
B) $\frac { 16 } { 3 } \pi$
C) $\frac { 32 } { 3 } \pi$
D) $\frac { 256 } { 3 } \pi ( 2 \sqrt { 2 } - 1 )$