can i have the answer of part a and b of Q1 please?

Q1. Polymers have emerged as a promising family of advanced materials for biomedical engineering. [20 marks] a) Glass-transition temperature is an important thermal property of a polymer. i) Define glass-transition temperature, T ? [2 marks] ii) On a graph of Heat Flow versus Temperature, sketch the heating profile of a polymer and mark Tis on the curve. [ 2 marks] iii) Polymer Y is suitable to be used as a ligament implant. Predict TE of Y. Explain your answer. [3 marks] iv) Referring to Figure 1, which polymer has higher T8 ? Explain your selection. [3 marks] Figure 1: Chemical structure of polymers b) In a fiber-reinforced composite, orientation of fiber determines strength of the composite. By assuming tensile force is applied on the composite, composite A shows MAXIMUM while composite B shows MINIMUM effectiveness in strengthening the composite. Please sketch the orientation of fiber on each of the composites (Figure 2). [4 marks] Figure 1: Schematic diagram of tensile test