Required information

Structure OAB is built in at point $O$ and supports forces from two cables. Cable CAD passes through a frictionless ring at

point $A,$ and cable DBE passes through a frictionless ring at point $B.$ The force in cable CAD is $250$ N and the force in

cable DBE is $100$ N $.$

Use a vector approach to determine the moment of all cable forces about point $O.($Round the final answers to four decimal places.

Include a minus sign if necessary.$)$

The moment of all cable forces about point $O$ is $(,$hat$(i)+|,|hat(j))N*mm.$