What is the safe load of a footing laid at a depth of $1.3\text{m}$ b…

Question

What is the safe load of a footing laid at a depth of $1.3\text{m}$ below the ground surface under the following condition:

i) Size $2\text{m} \times 2\text{m}$, G.W.L. at 8m below natural ground level; and

ii) Size $2\text{m} \times 2\text{m}$, G.W.L at $1.5\text{m}$ below natural ground level.

The load on the footing acts at an angle of $15^0$ to the vertical. Take $\gamma=20\text{kN/m}^3$, $\gamma_{sat}=21\text{kN/m}^3$ and angle of internal friction of $30^0$.Use Vesic's bearing capacity factors $N_q=18.4$ & $N_c=22.4$.