Erasing unwanted lines

Need to erase some lines in this design I did on Easel. Cant find a way to do it.

I’m sure I am not the only one to have asked this.

Looking to keep the entire outline of the design. Just need to erase the 2 curved lines inside the Rectangle and the top of line of the rectangle.

How do I do this in Easel? or how can I do this?

Bobdesign

I create a shape, place it over the lines not to carve and set the depth for the shape to zero.
Depending on the situation, you may be able to combine the two objects.

Click on the object you want to edit, press E and you can edit the nodes of that object. You can alter position and radius/curvature of the lines.