A 44 K matrix and the associated force vector, f, are given as below 6 -1 0 0 -1 5 -2 0 K 0 -2 4 -1 and f 6 0 0-1 2 2 Use the penalty method to solve the problem, Ku = f + R, with the following boundary conditions: u = 0, andu - 2u = 2. The answers should include the displacement vector as well as the associated constraint forces in vector, R.