I'm assuming you've had a go. Some of you might say, well, isn't this going to be equal to the probability that V is equal to five plus the probability that V is equal to six plus the probability that V is equal to seven, and it just goes on and on and on forever. This is actually true. You say, well, how do I calculate this? It's just summing up an infinite number of things. Now, the key realization here is that one way to think about the probability that V is greater than four is this is the same thing as the probability that V is not less than or equal to four. These two things are equivalent.