The compression member shown consists of a solid aluminum $(E=73$GPa $)$ bar $A$ of diameter

$100$ mm $,$ a brass $(E=100$GPa$)$ tube $B$ of inside diameter $100$ mm and outside diameter $150$

mm $,$ and a steel $(E=210$GPa $)$ pipe $C$ of inside diameter $125$ mm and outside diameter $200$

mm $.$ Ignore the rigid plates in your modeling.

$($a$)$ Use the theory of M$.$O$.$M$.$ to find the displacements, member forces, reactions, stresses,

and strains.

$($b$)$ Use the finite element analysis to determine the displacements, reactions, member forces,

stresses, and strains.