The diagram shows a composite figure made up of a hemisphere mounted on top of a solid cube. The cube has a side length of 14 cm. The hemisphere has a diameter equal to the side of the cube. (a) Calculate the volume of the composite solid. (b) Calculate the total surface area of the composite solid. (c) If the composite solid is made of a material with density 2.5 g/cm³, calculate the mass of the solid in kilograms, correct to 3 significant figures. [Take π = 22/7]