$1\mathrm{.}20\mathrm{.}1$: 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 $=(4\mathrm{.}0/3\mathrm{.}0)$ r$3($Hint: r$3$ can be computed using $*)$

A drink costs $2$ dollars. A taco costs $3$ dollars. Given the number of each, compute total cost and assign totalCost with the result. Ex: $4$ drinks and $6$ tacos yields totalCost of $26.$