2. Both (a) and (b) are the optical images of an aluminum alloy microstructures of the same composition, one of them was rolled at room temperature and the other was not deformed. a- Determine which one was rolled (justify your answer) (1 pt) b- Which one you would expect to have lower dislocation density? (1 pt) c- Which one you would expect to have higher ductility and why? (1 pt) d- To eliminate completely the rolling effect on the microstructure and mechanical properties, what is heat treatment, you would suggest, and what are the stages of this heat treatment? (2 pts) 100 100