3. (a) Consider a following cooling curve of two component system Wand B. 0% B 20%B 60% B 80%B 100%B 460 440 420 400 380 Temperature (K) 360 340 320 310 10 15 20 25 Time (min) Plot a solid-liquid phase diagram of W and B from above cooling curve complete with appropriate label and find the eutectic point. [12 marks]