1.10 to start and 19 to stop 2. I just learned how to stop doing it 3. Nothing big needed 4. Anxiety caused it but I beat it 5. If it's neurological stutter then sadly there's nothing I can say, when it's neurological by what I've read it is uncurable, but I think speech therapy can help, if it's psychological stutter that is stuttering simply for feeling too anxious then you should while speaking just simply focus on beating that anxiety, patience is also necessary Take care