$A, B, P, Q, R$ are five points in a plane. If the forces acting at point $A$ are $\overline{AP}, \overline{AQ}, \overline{AR}$ and the forces acting at point $B$ are $\overline{PB}, \overline{QB}, \overline{RB}$,find the resultant of all these forces.
- A$3\,\overline{AB}$
- B$3\,\overline{BA}$
- C$3\,\overline{PQ}$
- D$4\,\overline{PR}$
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