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cing Systems Time left 0:42:12 A system has four processes P1, P2, P3, P4 and four types of resources R1=1 instance, R2=2 instances, R3=2 instances, R4 with a single instance. Process P1 holds an instance of R1 and requests an instance of R2 and R3. Process P2 holds an instance of R2 and R3 and requests an instance of R3. Process P3 holds an instance of R3 and requests an instance of R1. Process P4 holds an instance of R4. a) What are the Available resources? (2 marks) b) Can P1 request be granted? (1 mark) c) Can P2 request be granted? (1 mark) d) Explain the status of the system. (2 marks) e) Explain a deadlock situation using the resource allocation. (3 marks) f) Write the order of process execution? (2 marks) h) Assume that the resources are numbered (R1=5, R2=3, R3=1, R4=2) and each process request a resource in an increasing order of enumeration. What process requests are valid and invalid in the system? (4 marks) E = lal 7 = op