Answer:
see the explanation
Explanation:
we know that
case 1) if you have

The line is dotted and the shading is below the line
case 2) if you have

The line is dotted and the shading is above the line
case 3) if you have

The line is solid and the shading is above the line
case 4) if you have

The line is solid and the shading is below the line