The wall below is supporting a sand backfill with a uniform surcharge load.The wall is to be used to resist a force pushing against the wall $($not shown$).$ AssumeRankine conditions$($a$)$ Compute and plot the horizontal stress distributions down the wall. Label values at the top and base of the wall, and at the water table.$($b$)$ Determine the resultant force on the wall that you would use for design and it's location relative to the base. This total force is the resistance the wall can provide.