QUESTION 9 10. What does the system call fork0 do? O It starts a new program as another process. O It creates an exact copy of the caller process. O It checks if certain resources ("forks") are available. It starts a new program in the existing process. QUESTION 10 10. What happens if three threads wait on the condition x and another thread calls the function x.signal) five times? All three waiting threads resume the execution, but when x.signal) is called for the fourth time, the process crashes O This is not possible: at most one thread can wait on one condition. OAll three waiting threads safely resume the execution. O Only one of the waiting threads resumes the execution, the remaining four calls to x.signal) have no effect