Answer:
see the explanation
Step-by-step 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