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Define the following methods:

calcBaseArea$()$ 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: Area $=$ side length ${?}^2$

calcVol$()$ has one double parameter as a cube's side length. The method returns the cube's volume as a double, and uses

the calcBaseArea$()$ method to calculate the cube's base area. The volume is calculated by:

Volume $=$ base area $**$ side length

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