Hello! I am confusing the difference between drained and undrained. I have solved the problem already, but it seems off. Thank you! $=)$

Effective and Lateral Earth Pressure: Given the diagram below:

a$.$ Produce an effective stress diagram showing stresses at both the top and bottom of each of the three layers.

b$.$ Produce a $($Rankine$)$ lateral earth pressure diagram for drained $($long$-$term$)$ conditions.

c$.$ Produce a $($Rankine$)$ lateral earth pressure diagram for undrained $($short$-$term$)$ conditions.