Consider a preemptive SRTF scheduling technique followed by three processes P1, P2, P3. All of these 3 processes arrive at timet = 0 and their total execution time is 10, 20, 30 units respectively....

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Extracted text: Consider a preemptive SRTF scheduling technique followed by three processes P1, P2, P3. All of these 3 processes arrive at timet = 0 and their total execution time is 10, 20, 30 units respectively. Each process spends first 10% of execution doing I/O, 70% CPU and rest doing 1/0 operation. What will be the CPU idle % time to execute all processes? (Assume a uniprocessor and all I/O operations can be overlapped)