10.12 Refer to Figure 10.17. Given: B = 3.7 m, q = 16.8 kN/m², x = 2.7 m, and z = 1.5 m. Determine the vertical stress increase, Ao, at Point A. 10.13 Repeat Problem 10.12 for B = 3 m,q = 60 kN/m², x = 1.5 m, and z = 3 m. B q=Load per unit area >>drk ??. ?. FIGURE 10.17 Vertical stress caused by a flexible strip load