Consider gravity loading only under complete lateral restraint in flat strata with properties given in table. Vertical stress at the top of the geologic column given in table is $6\mathrm{.}9$MPa. Compression is positive, $y$ is unit weight, $h$ is thickness, $E$ is Young's modulus, and $G$ is shear modulus. Find the horizontal stress at the bottom of the sandstone and the top of the limestone$.$

$\backslash$table$[[$Stratum$,,k\frac{N}{m^3},h,m,E,$Gpa,$G,$Gpa