8 A birthday cake is in the shape of a cylinder. There are two layers of cake and one layer of icing. Each layer of cake has radius 10 cm and height 3 cm. The icing, between the two layers of cake, has radius 10 cm and height 12 mm. (a) Calculate the volume of icing in the birthday cake. Give your answer in cm^3. (b) The top and curved surface of the birthday cake are now covered with chocolate. Calculate the area of the birthday cake that is covered with chocolate. (c) Anil has a slice of this chocolate-covered birthday cake. His slice is a prism of height 7.5 cm. The top of the cake is a sector, radius 10.3 cm and angle x°. The volume of his slice is 200 cm^3. Calculate the value of x.