In \(ΔPQR\), right-angled at \(Q\), \(QS\) is perpendicular to \(PR\). If \(PQ = 6 cm\) and \(PS = 4 \ cm\). Find \(QS\), \(RS\) and \(QR\).
 
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\(QS = \) ii \(cm\)
 
\(RS = \)  \(cm\)
 
\(QR = \) ii \(cm\)