If \( P(\vec{p}) \), \( Q(\vec{q}) \), \( R(\vec{r}) \), and \( S(\vec{s}) \) are four points such that \( 3\vec{p} + 8\vec{q} = 6\vec{r} + 5\vec{s} \), then the lines PQ and RS are
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If $P(\vecp)$, $Q(\vecq)$, $R(\vecr)$ and $S(\vecs)$ be four points such that $3\vecp+8\vecq=6\vecr+5\vecs$, then the lines PQ and RS are