G. The boundary value problem (1 du E (dg) = f(r) 11(0) 2 0 = u(1). models the displacement 11(1) of a, uniform elastic bar With stiffness e(.r)=1/(1+ 1'2) on [0.1]. (at) Find the displacement u(;r) when the bar is subjected to the constant external force f (I) = 1 by directly integrating. (1)) Find the Green's function for the BVP. (c) Use the resulting superposition formula to check your solution to part (a). (d) \\Vllicll point 0 > 6