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The length of the diagonal of the parallelogram \(PQRS\) is \(PR =\)14 \(cm\) and the distance between the points \(O\) and \(S\) is 5.4 \(cm\). Find the length of \(QS\) and \(OP\).
 
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1. The length of \(QS\) is \(cm\)
 
2. The length of \(OP\) is \(cm\).