Based on linear element condition, as indicated in the following equation Displacement, Y = a + a2X and Boundary condition when X-X, Y = Y and when X = X2, Y=Y2; The shape function is X- X N(x) = X2 - X1 X - X N(x) = X2 - X1 a) Show step by step how this shape function is derived. b) Using the shape function and Galerkin's Residual Method, conduct the Residual Integral for node 2. The governing equation is dy C dx + K = 0