Say you have an external signal attached to the D input of a flip-flop. That signal is not synchronized to the local clock. And say that the flip-flop has a set-up time of 2ns, a hold time of 3ns, and a clockto-Q time of 4ns. The external signal arrives at a random time. a) If the D flip-flop's clock is 20 MHz, what is the probability of a timing violation