6.17. A 2.0 m x 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a column load Q. The depth of the footing

is 1.0 m. The soil parameters are: d = 0, O = 26°,y= 19 kN/m, and cu = 60 kN/m^2. Determine the maximum possible value for Q, considering short-term and long-term stability of the footing.