Please show and explain all steps

$2/27$ The $4-kN$ force $F$ is applied at point $A.$ Compute the

moment of $F$ about point $O,$ expressing it both as a scalar

and as a vector quantity. Determine the coordinates of the

points on the $x-$and $y-$axes about which the moment of $F$ is

zero.

PROBLEM $2/27$