① the finite derwent meThod Ir position of boundary conditions(olis plcewent) We had obtained the aesewbed finite element eeve Kik2∞ Kht K Ki 2 for the f lowing problem and wo del The global stiffness etrix Is singular, which ts an indication tnst we have not imposed Hh ch boundary conditions(the varitional appo oada does no enforce then aulowattcall apropriste boundary Condition in this coGe s U4=0