Please help with part b$.$

P$1)$ A $2D$ frame is made of $4$ straight members $AB,BC,DE,$ and $FG$ that are interconnected by a pin$-$inslot at $B$ and pins at $D,F,G.$

$($a$)$ Determine the $3$ internal forces $($axial force, shear force, bending moment$)$ in member $AB$ at a point midway between A and $B,$ on a section that is perpendicular to $AB$

$($b$)$ Determine the $3$ internal forces $($axial force, shear force, bending moment$)$ in member $AB$ at a point midway between A and $B,$ on a section that is rotated $30CW$ from $AB.$ You may neglect any change in length due to the thickness of the members.Steps for