Give a geometric description of the following set of points. (x-7)² + y² + z² - 64 = 0

a) Sphere with center (7, 0, 0) and radius 8
b) Ellipsoid with semi-major axis 7 and semi-minor axis 8
c) Cone with vertex (7, 0, 0) and height 8
d) Cylinder with axis along the x-axis and radius 8