input: Write a python function to demonstrate concurrent execution using threading module.
  assert concurrent_execution() is None
output: import threading
  
  def concurrent_execution():
      def task(name):
          print(f"Task {name} is running")
      
      threads = []
      for i in range(5):
          thread = threading.Thread(target=task, args=(i,))
          threads.append(thread)
          thread.start()
      
      for thread in threads:
          thread.join()