Barrier synchronization is a technique used often in parallel programming. A barrier is a point in a set of processes such that all processes cross the barrier, only after all processe:s have reached the barrier. For example P1 S11 P2 S21 P3 S31 barrier barrier barrier S32 S12 S22 In the above case, P1 will execute S12 only after P2 has executed S21 and P3 has executed S31. Also, P2 will execute S22 only after P1 has executed S11 and P3 has executed S31. And P3 will execute S32 after P1 has executed S11 and P2 has executed S21. Using semaphores, show how you would implement the barrier for P1 P2 and P3. Barrier synchronization is a technique used often in parallel programming. A barrier is a point in a set of processes such that all processes cross the barrier, only after all processe:s have reached the barrier. For example P1 S11 P2 S21 P3 S31 barrier barrier barrier S32 S12 S22 In the above case, P1 will execute S12 only after P2 has executed S21 and P3 has executed S31. Also, P2 will execute S22 only after P1 has executed S11 and P3 has executed S31. And P3 will execute S32 after P1 has executed S11 and P2 has executed S21. Using semaphores, show how you would implement the barrier for P1 P2 and P3