$1\mathrm{.}8\mathrm{.}1$: Sphere volume.

Given sphereRadius, compute the volume of a sphere and assign sphereVolume with the result. Use $(4\mathrm{.}0/3\mathrm{.}0)$ to perform floating$-$point division, instead of $(4/3)$ which performs integer division.

Volume of sphere $=(4\mathrm{.}0/3\mathrm{.}0)\backslash$pi r$3($Hint: r$3$ can be computed using $*)$