QUESTION 4 (10 Marks) Figure 1 shows the differential scanning calorimetry (DSC) thermogram of polymer X. a) Discuss the results that can be obtained from the thermogram. b) Calculate the degree of crystallinity of polymer X based on the DSC data obtained in Figure 1. (Assume if the polymer X is 100% crystalline, the melting heat is 150.2J/g. c) Classify the polymer X based on its structure (whether fully crystalline, semi-crystalline or amorphous) and its thermal behaviour (whether thermoplastic, thermoset or elastomer)? Give reason of your answers. Figure 1