16. The size of a ball used in sport is often described by the measure of its circumference. The circumference of a ball is the length of the longest circle that can be drawn on the surface of the ball. A volleyball has a circumference of 66 cm and a basketball has a circumference of 29 1/2 in. a) Determine the radius of each ball to the nearest unit. b) Determine the surface area of each ball to the nearest square unit. c) Determine the volume of each ball to the nearest cubic unit. d) Which ball is larger? Justify your