I have made the outline for a shoe and i wish to separate the top tongue rectangle from the sole of the shoe. I am not sure how to individually separate each intersection of the shape.

[![The square displays the editing area I wish to use and separate from the sole of the  shoecdesign.  ](https://i.stack.imgur.com/RNJln.png)](https://i.stack.imgur.com/RNJln.png)