Identify the surface defined by the set {(r, 0, z) : 4r ≤ z ≤ 8}. Cone Cylinder Wedge Cylindrical shell Question 9 1 pts Identify the surface defined by the set {(p, 0, 0): p = 16 cos 6,0 ≤ ≤ 2}. Cone Spherical shell Sphere Cylinder 1 pts Question 10 1 pts True or false? The sets {(r, 0, z) : r = ; = z} and {(p, þ, 0) : 6 = {} are the same (i.e. define the same conical surface). True False