Figure 1 shows the atomic arrangement in two different alloys, A-B alloy and A-C alloy. Atom A Atom B Atom A Atom C Figure 1: Atomic arrangement in alloys (a) Suggest TWO (2) type of alloys with the atomic arrangement as A-B alloy and A-C alloy, respectively. Discuss the difference in their alloying mechanism. (10 marks) (b) Provide the phase diagram of your selected A-B alloy in (a) and describe the cooling (solidification) process of 80% A-20%B composition alloy. Include microstructure in your description. (15 marks) (c) Using the Gibbs phase rule, determine the degree of freedom for single phase and two-phase regions. Explain what the degree of freedom represents. (10 marks) (d) Differentiate between eutectic and eutectoid reactions. Provide an example of alloy for respective reactions. Predict the microstructure if the composition of the eutectic alloy is slightly diverted from the eutectic composition. (15 marks)