$(3\mathrm{.}2)$ Consider the Drucker$-$Prager plasticity model that was used in ABAQUS for HW$12$ Q$2.$

Based on our class discussions, where are the stresses computed using this nonlinear material model? Indicate the location$($s$)$ with $"$ X $"$ on the $4-$node quadrilateral element below. You can also describe the location$($s$).$

Do you think the stresses will satisfy the flow rule or yield criterion at other locations in the element? Explain.

Why does ABAQUS apply several load increments to solve the active earth pressure problem $($besides the time dependence of the loading$)?$