A line load on ground surface running in N$-$S direction in plan,is subjected to a load intensity of $150$ KN$/$m$.$ Consider a vertical section in E$-$W$-$direction and show variation of vertical stress increments on a horizontal line situated at $2$m depth in this section. Compute vertical stress increments upto a distance of $5$m on either side of the line load at an interval of $1$m$.$