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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 integratedAutocorrelationTimeMultiple(A_kn, fast=False):
 """Estimate the integrated autocorrelation time from multiple timeseries. See Also -------- statisticalInefficiencyMultiple """


    g = statisticalInefficiencyMultiple(A_kn, fast, False)
    tau = (g - 1.0) / 2.0
    return tau