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A system has four processes P1, P2, P3,and P4, and two resources R1 and R2. There are three instances of R1 and three instances of

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A system has four processes P1, P2, P3,and P4, and two resources R1 and R2. There are three instances of R1 and three instances of R2. P1 holds an instance of R2 and is requesting an instance of R1. P2 holds an instance of R1. P3 holds an instance of R1 and is requesting an instance of R2. P4 holds two instances of R2. Draw a resource allocation graph for this situation. Does a deadlock exist

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