A.Describe the sequence of event that would lead to the condition where both threads are stuck forever.

B.How would you change the above program to prevent the deadlock?

(7) Semaphores can be used to limit access to resources. The following system uses two threads. Both threads need access to a printer and an SPI (a communication port) port at the same time. The binary semaphore sprint provides mutual exclusive access to the printer, and the binary semaphore sSPI provides mutual exclusive access to the SPI port (the Outs would open a port for communication). The following scenario has a serious flaw: PI function Thread 1 P(&sprint): P(&sSPI); printf ece554 bye"); OutSPI(25); V(&sSPI); V(&sprint); Thread 2 P(&sSPI); P(&sprint); printf("ece554 welcome"); OutSPI(50); V(&sprint); V(&sSPI): Describe the sequence of events that would lead to the condition where both threads are stuck forever. a- b- How would you change the above program to prevent the deadlock