The following shows a schematic section of a three-story reinforced concrete building. The building weights, elevations and seismic story forces are shown in the table below. What is the seismic base shear coefficient, Cs for this building? F-1200 k Fare 800 k Fa-400 k Roof 3rd Fir 2nd Fir Lovel Roof Story Weight (Kip) 3,000 k Elevation (ft) Story force, F (kip) Story shear (p) Building Elevation and Seismic Story Forces Story overturning moment (kip-ft) 42 1.200 1,200 14,400 34 4,000 k 30 800 2,000 44.400 2 4,000 k 15 400 2,400 80.400 11,000k 0.22 0.24 0.26 0.28 2.400K