The arrangement shown in figure has \(2\) masses \(M = 4\,\text{kg} \) and \(m= 1\,\text{kg}\). The magnitude of acceleration of mass \(M\) and \(m\) is \(p\) and \(q\) respectively. The value of \(p+q\) is \((g=10 \text{m/s}^2)\) :

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