Imagine a scene in which a birdwatcher, whose eye is located at , is watching a bird located at .
What is the vector from the birdwatcher’s eye to the bird? ,,
Express that vector as a direction (without magnitude). ,,
Suppose the birdwatcher is using a telescope, which we wish to represent in a 3D scene as a cylinder extending from the birdwatcher’s eye to the bird. We know the center of one end of the cylinder (the eye point), but need to compute the other. If the telescope is 0.26 units long, what is the center of the other end of the telescope?
Answer: (,,)

You can earn partial credit on this problem.