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A "tug-of-war" has started with an old tire in the center. Three people are pulling, as shown. Person 1, exerts F1= N has shown, straight to the left. Person 2, exerts F2= N, straight down in the figure, and person 3 exerts some force F3, at some angle as shown. With what force (F3), and at what angle () should person 3 pull so that the tire doesn't move at all?

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