3. a) What are plunge anticline and plunge syncline? How do they form? What are implication of them? (5 marks) b) Figure 3b is a rock core collected from the site investigation project. Find the Rock Quality Designation (RQD) and Fracture index (FI) of the rock core shown in Figure 3c. How to base on RQD to classify the rock mass. At least one full diameter 0 10cm Figure: 3b (5 marks) Non-intact No recovery Joint c) How to use the complete stress-strain curve to explain the process of uniaxial compression test? Explain the variation of stress-strain curve with respect to the loading process. What is compressive rock strength? d) Explain modes of failure may occur in rock. (5 marks) (5 marks)