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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dean_number(PlantFlow, IDTube, RadiusCoil, Temp):
 """Return the Dean Number. The Dean Number is a dimensionless parameter that is the unfortunate combination of Reynolds and tube curvature. It would have been better to keep the Reynolds number and define a simple dimensionless geometric parameter. """

    return (reynolds_rapid_mix(PlantFlow, IDTube, Temp)
            * (IDTube / (2 * RadiusCoil))**(1/2)
            )