Problem $1.$ Determine the resultant internal normal and shear force in the member at $($a$)$ section a$-$a and $($b$)$ section b$-$b$,$ each of which passes through the point A$.$ The $550lb$ load is applied along the centroidal axis of the member.

$550lb$

$550lb$

Please include a graph $($ very important for me to understand what they are asking me for this problem$)$ and the step$-$bye$-$step procedure. Thanks.