$[70$ points$]$ You are a staff engineer for a local geotechnical engineering firm. As part of the geotechnical exploration for a project, several subsurface tests have been conducted. You are given the results of one traditional soil boring with Standard Penetration Testing $($SPT$).$ The results of this boring, labeled as B$-2,$ are presented on page $3$ of this assignment. Based on testing of collected soil samples, the encountered soils have the unit weights listed in Table $1($Note that two ML layers have a same unit weight, so are the two CH layers; and the soil layers listed in the Table aren't meant to represent the actual layer sequence or order$).$

Determine the total pore pressure and effective stress in the soils from the ground surface to the bottom of the burrhole