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c) A 3D hollow boiler shell consists of a cylindrical section of length 14m and diameter 6m, on one end of which is surmounted a hemispherical section of diameter 6m, and on the other end a conical section of height 7m and base diameter 6m. P 6 m 14m ¦Q 0 3m A B 7m R (i) Calculate the volume of the boiler. (ii) Calculate the total exterior surface area of the boiler as shown above. Remember to show all your working out and NOTE that this is a hollow boiler.

Fig: 1