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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 holtWintersConfidenceArea(requestContext, seriesList, delta=3):
 """ Performs a Holt-Winters forecast using the series as input data and plots the area between the upper and lower bands of the predicted forecast deviations. """

    bands = holtWintersConfidenceBands(requestContext, seriesList, delta)
    results = areaBetween(requestContext, bands)
    for series in results:
        series.name = series.name.replace('areaBetween',
                                          'holtWintersConfidenceArea')
    return results