2 (15%) Consider a tapered bar of circular cross section. The length of the bar is 1m, and the radius varies as r(x)= 0.05–0.04x, where r and x are in

meters. Assume Young's modulus E = 100 MPa. Both ends of the bar are fixed and F = 10,000 N is applied at the center. Determine the displacements, axial force distribution and the wall reactions using four elements of equal length.