Quiz 2 Page 2 of 2 2. Suppose that we have four points P(0,0,0), Q(1,2,1), R(0,3,3), S(1,1,2) in space that are vertices of a parallelogram. (a) (6 points) Find the area of the parallelogram (identify the two edges with P as endpoint, and then calculate the length of their cross product.) (b) (6 points) Suppose that a sphere in space has center at S and radius ll so that Q is on the sphere. Find the standard expression of this sphere