Solve the following problem by using a) Two elements with two nodes b) Two elements with three nodes c) d) Two elements with four nodes For each of the above cases (a, b, and c) Find the nodal displacement, the reaction on the left support and the stress in each element E, = 140GPA, E, = 100GPA, L, = 3m, L, = 3m A, = 2cm, A, = 4cm? , f(x)= (x +x+ 20) kN %3D f(x) 5 kN 10 kN A2 A1