code: def _SP_Summaries_welch_rect_area_5_1(X, X_fft):
      # Total power in lowest fifth of frequencies in the Fourier power spectrum.
      return _summaries_welch_rect(X, False, X_fft)
  
imports: import math
  import numpy
  from sktime.utils.numba.njit import njit
label_desc: Use image node_id 22 for calling a global function with example usage: _SP_Summaries_welch_rect_area_5_1(X, X_fft) and returns: _summaries_welch_rect