Question A2: Look at the material property listed below. Discuss factors that affect each material property (considering atomic structure, crystalline structure, microstructure, manufacturing process, and operations conditions), and how we can improve the material property by controlling the manufacturing process and structures. (a) The compressive strength of a concrete at the hardened state. [4 marks] Limit your answer to within 100 words. (b) The melting point of an alloy. [4 marks] Limit your answer to within 100 words. (c) Mechanical strength of a steel. Limit your answer to within 100 words. [4 marks]