Define the following functions: CalcBaseArea$()$ has two double parameters as a pyramids base length and base width. The function returns the area of the pyramids base as a double. The area of the hase is calculated by: area $=$ base length $*$ base width.

CalcVol$()$ has three double parameters as a pyramids base length, base width and height. The function returns the pyramids volume as a double, and uses the CalcBaseAreq$()$ function to calculate the pyramids base areq. C$++$