2. Suppose that you are working for an engineering firm that is working for designing a braced excavation, and you are required to calculate the forces to which struts are subjected ( Figure 1). For the clay layers observed at the first and second layers in the Figure 1, you are given the relationship Figure 2 to obtain the soil shear strength with respect to shear wave velocity of the clays (VS). The Vs of the clay, and clay, are provided as 100 m/s and 300 m/5. Clay1 15 ft 26 ft Clay 2 15 ft - 10 ft 30 ft Figure 1 Plan details of Braced Excavation? . What values of shear strength would you select from the relationship in Figure 2 for these clay layers? (1 points) . If you assign shear strength values using only the median relationship (red line in Figure 2), what would be the issue of working only the median value? (1 points) What can you say about the collected data (the dots around the median relationship ) corresponding to the Vs of the clay layers (100 m/s and 300 m/s) in terms of aleatory variability and epistemic uncertainty ? (1 points)