... and joins C in the queue.When B leaves, there is no guarantee that C goes next. In fact, if A goes next, and B joins the queue, then we are back to the starting position, and we canrepeat the ... Thread A gets to the signal first then the value of the semaphorewill be incremented, and when Thread B gets to the wait, it will proceed im-mediately. Either way, the order of a1 and b1 is guaranteed.12 ... many names, but there is a reason for the plurality. increment and decrement describe what the operations do. signal and wait describe what they are often used for. And V and P were the originalnames...