Q$\mathrm{.}3)$A three$-$dimensional L$-$shaped plate is subjected to three forces and a

moment as shown below.

$($a$)$ Express the given forces and moment as Cartesian vectors.

$($b$)$ Replace the given loading $($force system$)$ by an equivalent resultant force

and moment $($Resultant force system$)$ at point A$.$ For moment calculations

use the Vector approach.