$($a$)$ For loading $($a$)$ shown below, determine $F_A$ and $$ so that the forces applied at points A and $B$ are a

couple. Determine the moment of the couple.

$($b$)$ For loading $($b$),$ determine $F_1$ and $F_2$ so that this loading is equivalent to the couple in Part $($a$).$

$($c$)$ For loading $($c$),$ determine $Q_1$ and $Q_2$ so that this loading is equivalent to the couple in Part $($a$).$

$($d$)$ For loading $($d$),$ determine $M_A$ so that this loading is equivalent to the couple in Part $($a$).$

$($a$)$

$($b$)$

$($c$)$

$($d$)$