In the diagram, \(\text{PS}=5\), \(\text{PQ}=3\), \(\triangle \text{PQS}\) is right-angled at \(\text{Q}\), \(\angle \text{QSR}=30^\circ\) and \(\text{QR}=\text{RS}\).

What is the length of \(\text{RS}\)?

\(\dfrac{\sqrt3}{2}\)\(\sqrt3 \vphantom{\dfrac{\sqrt3}{2}}\)\(2 \vphantom{\dfrac{\sqrt3}{2}}\)\(\dfrac{4\sqrt3}{3}\)\(4 \vphantom{\dfrac{\sqrt3}{2}}\)