the help of appropriate domain discretization, governing equations and boundary conditions, explain.

the help of appropriate domain
discretization, governing equations and boundary conditions, explain the
three-dimensional application of FEM for potential flow in a cubic cavity of
size 1 m. Use linear prism elements. Using the direct approach, develop element
stiffness matrix for a cantilever beam of length L subjected to a concentrated load
W at the free end and find the expression for the deflection and slope at the
free end.