please help me
one rectangle is “framed” within another. find the area of the shaded region if the “frame” is 1 unit wide.
![please help me one rectangle is framed within another find the area of the shaded region if the frame is 1 unit wide class=](https://us-static.z-dn.net/files/d63/1106016acb9ea3207f14e9ac7525c7bc.png)