[1]-First of all you will press (ctrl +N) now you will see the new window is open Click on the line button Create a line like this in the left view port
[1]-First of all you will press (ctrl +N) now you will see the new window is open Click on the Geometry > Extended primitives > Chamfer Box. Create a Chamfer box with the following size (Length: 81.0) (Width: 115.0) (Height: 16.0) (Fillet: 1.69)