Question: Add the necessary flags to synchronize operations A, B, C, and D so that A and B are executed concurrently. Before executing C and D,

Add the necessary flags to synchronize operations A, B, C, and D so that A and B are executed concurrently. Before executing C and D, but C. D executed them concurrently. You have to use minimum number of semaphore variables as possible.

Add the necessary flags to synchronize operations A, B, C, and D

Semaphore

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