Email task creator when task is updated/marked complete

Email task creator when task is updated/marked complete

I am looking for a way to notify the creator of a task in zoho todo when -
  1. Task is updated
  2. Task is closed
  3. Comments entered
1 and 2 are critical, and I cannot find a zoho flow to do this. There is no way that as a manager I will know when someone has completed a task or made an update, unless I keep it in my memory and check for the status of a particular task.