(Solved): Please help! A seat of a roller coaster is subjected to the forces shown during a turn. The force at ...

A seat of a roller coaster is subjected to the forces shown during a turn. The force at $A$ is vertical, the forces at $B$ and $C$ are parallel to the $x$ and $z$ directions, respectively, and the forces at $D$ and $E$ lie in planes parallel to the $yz$ plane. Determine an equivalent force system at point $O$, where the seat is attached to the car. Take the value of $P$ to be $39\mathrm{lb}$. (Round the final answers to three decimal places. Include a minus sign if necessary.) The value of ${\vec{F}}_R$ of the equivalent force system is $(\hat{i}+\hat{j}+?\hat{k})\mathrm{lb}$. The value of ${\vec{M}}_{RO}$ of the equivalent force system is $(??\hat{i}+()\hat{j}+(?\hat{k})$ in. Ib.