Can someone walk me through the steps of figuring out question #28 in the NCARB Exam Guide: http://www.ncarb.org/ARE/~/media/Files/ ... _Guide.pdf (see link for diagram)

What is the factor of safety against overturning for the concrete shear wall shown if resisted only by gravity forces? Assume the weight of concrete equals 150 lb/ft3, and the dead load equals 240 kips. Ignore the weight of the soil over the footing.

Answer: 4.2

Thank you!