Question:

Can you show me how to shade the area between the curves step by step?

Answer:

FX Graph/Draw can only find integrals between functions and the red curve is a relation. To get what you are after, we need to add a function that FX Graph can use. In this case, the function is y=sr x. In my example, I have left the curve magenta, but if you change the colour to red, you will never see it.

Now select the integral tool and hover over one of the points of intersection.

Click and drag the mouse.