All the elements have the same material properties that are listed below in Table $1.$ All the truss

frames are shown in Table $2.$

Table $1$ Truss Frame Properties

You are required to:

$1-$Use the Method of joints or method of sectioning to mechanically analyse the truss

provided using hand calculations of static equilibrium. Show your detailed working.

Present the results for element forces, support reactions and stresses.

$2-$Construct an FEA model which allows you to investigate the behavior of the truss.

It is expected that your FEA model will allow you to calculate the following:

a$.$ Forces in all elements

b$.$ Reaction forces at supports

c$.$ Stress in all elements.

You should use Robot Structural Analysis to construct your FEA

model. Compare these with the results from your Mechanical model.

$3-$Calculate the percentage of error as follows:

Percentage $of$ error $=100[\frac{\text{F}\text{E}\text{A}\text{m}\text{o}\text{d}\text{e}\text{l}\text{f}\text{o}\text{r}\text{c}\text{e}-\text{H}\text{a}\text{n}\text{d}\text{c}\text{a}\text{l}\text{c}\text{u}\text{l}\text{a}\text{t}\text{e}\text{d}\text{f}\text{o}\text{r}\text{c}\text{e}}{\text{H}\text{a}\text{n}\text{d}\text{c}\text{a}\text{l}\text{c}\text{u}\text{l}\text{a}\text{t}\text{e}\text{d}\text{f}\text{o}\text{r}\text{c}\text{e}}]$

Table $2$ Truss frames

Please the answer type $1,2,3$ and $4$ step by step $!?$