Suppose a program P has the following three threads Threadi, Thread2, and Thread3, and a shared counter, count, as shown below: int count- 10; Semaphore Lock - 1; initial value is 1 Thread1(-) I do something Lock Waint(); count++; Lock Signal(); Thread2(.) do something Lock Wait: count Lock Signal() Thread3(-) I do something Lock Wain) printf "d", count): Lock Signal(). Upon the execution of the program P, the number of possible orders of execution of threads where the output will be 10 is Note : The above three threads are non preemptive threads.

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