A masonry wall of trapezoidal section 1 meter at the top and 4 meters wide at the bottom is 6 meter high. It h?

A masonry wall of trapezoidal section 1 meter at the top and 4 meters wide at the bottom is 6 meter high. It has to retain water on its vertical side upto the top level. Find the maximum and minimum stress intensities at the base section, if masonry weighs 19200 N/m^3 .