Problem $2$: Replace each of the force$/$moment systems shown with an equivalent force $(F_f)$ and Moment about $A(M_{fA}).$ Which cases are equivalent to each other?

$($a$)$

$($b$)$

$($c$)$

$($c$)$

$($f$)$

$\backslash$table$[[$Case$,F_1,M_{\frac{?}{?}}$