A spherical balloon is being inflated. Find the rate of increase (with respect to its radius, in inches, r) of the surface area, in square inches, (S = 4mr?) when: (A) r = 2 inches - Rate of increase, in square inches per second, = (B) r = 3 inches - Rate of increase, in square inches per second, = (C) r = 5 inches - Rate of increase, in square inches per second, =