input: 
  from typing import List
  
  
  def create_bpmn_diagram(clusters: List[dict], connections: dict, image_path: str, 
                          dot_file_name: str, png_file_name: str) -> None:
      """
      Create a BPMN diagram using the bpmn_pgv library. The diagram should include clusters
      with specific tasks and edges defined within each cluster. Additionally, include nodes
      for SIGEFOMDES Administración and SISAC, and connect them to the appropriate clusters
      using dashed edges. Finally, save the diagram as a PNG file and a DOT file.
      
      >>> create_bpmn_diagram([{'name': 'Secretaría Ejecutiva', 'tasks': ['Recibir el documento protocolizado', 'Revisar el documento protocolizado'], 'start': 'se7', 'end': 'se9'}, {'name': 'Presidencia', 'tasks': ['Firma del cheque', 'Entregar cheque a beneficiario'], 'start': 'p1', 'end': 'p2'}], {'Beneficiario': {'se7': {'style': 'dashed'}, 'p2': {'style': 'dashed'}}}, 'path/to/image.png', 'proc4.dot', 'proc4.png')
      None
      >>> create_bpmn_diagram([], {}, 'path/to/image2.png', 'proc5.dot', 'proc5.png')
      None
      """
  
output:     
      from bpmn_pgv import BPMN
  
      # Create a new BPMN diagram
      bpmn = BPMN()
  
      # Add clusters to the diagram
      for cluster in clusters:
          with bpmn.cluster(cluster['name']) as c:
              for task in cluster['tasks']:
                  bpmn.add_task(task)
              bpmn.add_edge(cluster['start'], cluster['tasks'][0])
              bpmn.add_edge(cluster['tasks'][-1], cluster['end'])
  
      # Add nodes for SIGEFOMDES Administración and SISAC
      sigefomdes = bpmn.add_task('SIGEFOMDES Administración')
      sisac = bpmn.add_task('SISAC')
  
      # Add connections to the appropriate clusters using dashed edges
      for node, edges in connections.items():
          for target, style in edges.items():
              bpmn.add_edge(node, target, style=style['style'])
  
      # Save the diagram as a PNG file and a DOT file
      bpmn.write_png(image_path)
      bpmn.write_dot(dot_file_name)
  