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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 nr_of_baselines(na, auto_correlations=False):
 """ Compute the number of baselines for the given number of antenna. Can specify whether auto-correlations should be taken into account """

    m = (na-1) if auto_correlations is False else (na+1)
    return (na*m)//2