You’ll make plots in 3D.

**MOOC**ULUS Virtual-Reality squad has hired you (for points, not cash) to build some VR demos. You will work in groups of four, where each group member is responsible for modeling a specific demo:

- One group member will make a demo showing the intersection of two planes.
- One group member will make a demo showing two circles (a great circle and a regular circle) on a sphere.
- One group member will make a demo showing the intersection of a sphere and a plane.
- One group member will make a demo showing two circles on a torus.

Finally, as a **group**, you must make a demo showing a möbius strip with a tube
hovering above the side.

For extra credit, your group may submit a “creative” plot as well.