Sadie, I and my team have already answered this question. See this answer to Rainnie.
To check on whether a question has already been asked go to the right hand column there is a SEARCH THE SITE box. Type a keyword , like ‘Touch’ into the box and then click enter on your computer. It will lead you to the answer I have connected you to .
Sadie, thanks for the question. It shows how important it is to Search First.
If you are uncertain about some bits of the answer then please feel free to Ask Another question.