code: def preprocessing_br_projection_excel(path: str) -> pd.DataFrame:
      
      if not os.path.exists(path):
          raise ValueError("Error: %s file not found" % path)
  
      return pd.read_excel(path, sheetname=0, header=0)
docs: Preprocess the excel file.
  
      Parameters
      ----------
      path : Filepath of the excel sheet