I Iaulu u 4. The assembly shown in Figure 4 consists of an aluminum tubeAB having a crosssectional area of 400mm. A steel rod having a diameter of 10 mm is attached to a rigid collar and passes through the tube. It a tensile load of SE] kN is applied to the rod, determine the displacement of the end: of the rod. TakeEat = 20G GPa, E a! = Tl] GPa. n - rill! mm '| Figure 4 5. The two pipes are made of the same material and are connected as shown in Figure 5. The Young's modulus of the material isE . 1F the cross-sectional area oFBC is A and that ofCD i5 2A. determine the reactions at B and D when a force F is applied at the junction C. Also derive the expression of the displacement of pointC under this load. Figure 5