A 2:1 natural slope is underlain by a 3-m thick (measured vertically) soil cover over bedrock. Compute the factor of safety by using an effective stress infinite slope analysis with c'=0 and o' (theres a line between that)= 35 degrees for the soil, assuming the following:
1.) The soil cover is totally dry and y= 18kN/m^3.
2.) The soil cover is totally saturated and y= 20kN/m^3.