What would be the total stress, effective stress, and pore water pressure at the 5 m depth? 

This video focuses on questions related to Geotechnical engineering.
The depth of water in a lake is 4 m. The soil at the bottom of the lake consists of sandy clay. The water content of the soil was determined to be 25%. The specific gravity of the soil grains is 2.70. Determine the void ratio and the unit weight of the soil. What would be the total stress, effective stress, and pore water pressure at the 5 m depth into the bottom of the lake?