7-10 For each exercise, sketch a curve and a line L satisfy- ing the stated conditions. 7. L is tangent to the curve and intersects the curve in at least two points. 8. L intersects the curve in exactly one point, but L is not tangent to the curve. 9. L is tangent to the curve at two different points. 10. L is tangent to the curve at two different points and in- tersects the curve at a third point