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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 fft_freqs(n_fft, fs):
 """Return frequencies for DFT Parameters n_fft : int Number of points in the FFT. fs : float The sampling rate. """

    return np.arange(0, (n_fft // 2 + 1)) / float(n_fft) * float(fs)