A rectangular foundation has a dimensions B=1 m, and L=4 m, the depth of foundation Df=2.2 m, the soil unit density is 16.1 KN/m^3, the cohesion 15 KN/m^2,  Nc=10.16, Nq=2.98, Ngamma=0.69 find the force in KN that  the foundation can support for a factor of safety 3

This is Civil Engineering. Specifically Foundation Engineering. Please post thorough answers and work. Any plot needs to be computer generated. Thank you

A sandstone bed with RQD = 70% and y = 26.0 kN/m³ lies beneath 1.5 m of overburden soil. A 2.0 m X 2.0 m square foundation is to be placed on top of the sandstone rock (i.e., at a 1.5 depth below the ground level) to carry a column load. The unit weight of the soil is 18.0 kN/m³. Assuming the rock strength parameters from Problem 7.17,

Use Terzaghi's equation and Terzaghi's Table