David is playing a game in which he spins a spinner with equal-sized slices numbered through . The spinner stops on a numbered slice at random. This game is this: David spins the spinner once. He wins if the spinner stops on the number , if the spinner stops on the number , if the spinner stops on the number , and if the spinner stops on the number . He loses if the spinner stops on or .(If necessary, consult a list of formulas.)