What is the vertical stress resulting from rocks with the following characteristics: - Rock 1: density = 2400kg/m^3, depth = 10m - Rock 2: density = 1800kg/m^3, depth = 25m - Rock 3: density = 2000kg/m^3, depth = 35m Note: There is also a surcharge of 0.05 kPa on top of the rocks. Depth refers to the distance to the bottom of the rock face. Use g = 9.8m/s^2. Question 13Answer a. 1.362 MPa b. 2.04 MPa c. 0.696 MPa d. 0.669 MPa