1. The graph below shows how the temperature of a 2 kg lump of solid wax varies with time when heated. D 100- Temperature of B wax ( C) 80 60 40 A 20 - 50 100 150 200 Time( 5) a. Explain what is happening to the wax in the regions AB, BC and CD. b. If a 200 W heater was used to heat the wax, calculate the specific latent heat of fusion of the solid wax