input: Write a function to create a BPMN diagram for FOMDES process 1 using Python and the bpmn_pgv library. The diagram should include clusters for Secretaría Ejecutiva, Presidencia, and Presupuesto/Administración, 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 named "proc4.png" and a DOT file named "proc4.dot".
  assert create_bpmn_diagram("src/technicalBPMNWriter/proc4.py")==True
  assert create_bpmn_diagram("src/technicalBPMNWriter/nonexistentfile.py")==False
  assert create_bpmn_diagram(None)==False
  assert create_bpmn_diagram("src/technicalBPMNWriter/invalid_syntax.py")==False
  assert create_bpmn_diagram("src/technicalBPMNWriter/proc4_incomplete.py")==False
output: 
  def create_bpmn_diagram(file_path):
      if not file_path or not os.path.exists(file_path):
          return False
      
      try:
          with open(file_path, 'r') as file:
              content = file.read()
              exec(content, globals())
      except Exception:
          return False
      
      import bpmn_pgv
      
      g = bpmn_pgv.Digraph(name="FOMDES_Process_1", format="png")
      
      with g.subgraph(name='cluster_Secretaría_Ejecutiva') as c:
          c.attr(label='Secretaría Ejecutiva')
          c.node('Task1', 'Task 1')
          c.node('Task2', 'Task 2')
          c.edge('Task1', 'Task2')
      
      with g.subgraph(name='cluster_Presidencia') as c:
          c.attr(label='Presidencia')
          c.node('Task3', 'Task 3')
          c.node('Task4', 'Task 4')
          c.edge('Task3', 'Task4')
      
      with g.subgraph(name='cluster_Presupuesto_Administración') as c:
          c.attr(label='Presupuesto/Administración')
          c.node('Task5', 'Task 5')
          c.node('Task6', 'Task 6')
          c.edge('Task5', 'Task6')
      
      g.node('SIGEFOMDES_Administración', 'SIGEFOMDES Administración')
      g.node('SISAC', 'SISAC')
      
      g.edge('SIGEFOMDES_Administración', 'cluster_Secretaría_Ejecutiva', style='dashed')
      g.edge('SISAC', 'cluster_Presupuesto_Administración', style='dashed')
      
      g.render('proc4', format='png')
      g.save('proc4.dot')
      
      return True
  