A solid bar is fixed at ends (nodes: 1, 3) and loaded at node 2. Given: l=5.0 in, A=1.0 in², E=1.5 ksi, P=40.0 lb. Obtain:
a) Displacement of node 2,
b) Reactions in nodes 1 and 3,
c) Stresses in elements 1 and 2.