1) Open Illustrator.

2) Open/File. Make it 400 x 400 pixels. If the units are not pixels, go to Edit/Preferences/Units and Undos. In General, choose pixels.In Stroke,choose pixels.

3) create a square, not a rectangle,(hold down the shift key while draging on the artboard) with a green interior and a red stroke, 10 pixels side.

Then create a circle, not an oval, that has a swatch interior of your choice and a five pixel stroke of a color of your choice.

Save the document in your illustrator folder, call it Shapes and hand it into the hand in folder