The site shown in the square on the following map has been chosen to construct a 5-story office building and laboratory with a footprint of 10,000 ft². The location shown for the building will have a slab-on-grade floor at an elevation of 20 feet. Several outcrops of a bentonite bed have been mapped in the vicinity. Points X, Y, and Z are on the top of the bed and point P is on the bottom of the bed. Show the intersection of the bentonite bed on the proposed building foundation and cut, if applicable. What recommendations would you make regarding the siting of the building? What is the thickness of the bentonite bed?