I need help with finding the magnitude and direction of the graph attached. For part a I've tried 2 times with this question using F = sqrt ((Fx2 + Fy2)) to find the magnitude and the direction using tan-1(y/x), and so far it still says incorrect. A. Calculate the magnitude and direction. B. When a fourth force is applied to the mass, it is observed that the velocity of the mass stops changing and remains constant. What are the horizontal and vertical components of that fourth force? (This all the information that I was given)

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