If the last digit of your student ID ends in 5 or 6, you are required to answer question Q2-3. Q2-3: a) Compare and discuss the tensile response of the steel bar tested by your group with that of other groups, considering the key aspects such as stress/strain curves (assuming a diameter of 8.8mm and measured length of 50mm for the other group's steel bars), modulus of elasticity, and yield and ultimate strengths. (15 Marks) b) Discuss the ductility and sustainability of various steel bars tested by different groups and explore alternative reinforcement materials for steel bars. (15 Marks)