Question: Assume that Lock is implemented using a test-and-set instruction and busy (spin) waiting. Also assume that one processor owns the lock and is thus in

Assume that Lock is implemented using a test-and-set instruction and busy (spin) waiting. Also assume that one processor owns the lock and is thus in a critical section and that there are 3 others spinning on the lock. Explain why only one processor will be able to enter the Critical Region after the process currently owning the lock invokes Unlock. As part of your answer, describe a specific worst case scenario.

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