DONT USE CHAT GPT TO ANSWER $($ill give you a bad rating$)$

A $6$ m retaining wall supports soil as shown in the figure below. Assuming a frictionless wall surface, use Rankine's method to determine the force per unit length on the wall and resultant force line of action under the following conditions:

a$)$ Active condition

b$)$ Passive condition

Note: For each case, draw the pressure $/$ force per unit length distribution diagrams