A PDF can be downloaded below.
If you want to do work on a piece of paper or you have been asked to do a practical activity and share a picture, this can be done on both computers and mobile devices...
Laptop/Computer :
https://youtu.be/NmnfRlV7ASk?t=126 (watch from 2:05- this link should start the video at that time anyway)
Phone/Tablet:
https://youtu.be/C2fC7yrj984?t=8
Written instructions: