Suppose a computer lab contains two printers, three tape drives, and four terabyte crystal ROM writers. Assume process 2 is currently using a printer and two crystal ROM writers, process 1 is using a tape drive, and process 3 is using two crystal ROM writers, a tape drive, and a printer. Suppose now that process 2 requires a tape drive, process 1 requires a printer, and process 3 requires one more crystal ROM writer. Does there exist any safe sequence or not? Give reason/justification to support your answer.
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