code: def transform_using_this_method(original_sample):
      
      # Copy the original sample
      new_sample = original_sample.copy()
      new_data = new_sample.data
  
      # Our transformation goes here
      new_data['Y2-A'] = log(new_data['Y2-A'])
      new_data = new_data.dropna()  # Removes all NaN entries
      new_sample.data = new_data
      return new_sample
docs: This function implements a log transformation on the data.