The below tensegrity structure contained $3$ ropes $($R$1,$ R$2$ and R$3)$ and $2$ concrete members $($ABCD and EFGH$).$

$($a$)$ Draw $2$ free body diagram for the components above and below section LMNOPQ.

$($b$)$ Determine forces in all ropes.

$($c$)$ Draw bending moment, shear force and axial force diagram for $2$ concrete members $($ABCD and EFGH$).$

$($d$)$ Provide the definitions of tensegrity structure, the advantage of the structure and related reference source.