Define the following methods:

calculateBaseArea$()$ has one double parameter as a cube's side length. The method returns the area of the cube's base as a double. The area of the base is calculated by:

calculateVolume$()$ has one double parameter as a cube's side length. The method returns the cube's volume as a double, and uses the calculateBaseArea$()$ method to calculate the cube's base area. The volume is calculated by:

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Ex: If the input is $4\mathrm{.}0,$ then the output is:

Cube side length: $4\mathrm{.}0$

Base area: $16\mathrm{.}0$

Volume: $64\mathrm{.}0$