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Two forces of 40N and 80N act at an angle of 120 to each other. Find the magnitude and direction of the equilibrant force. (Include a diagram representing the forces) (5 marks) 9. Determine the intersection (if any) of the following lines: T = (-8,-5,1) + t(1,4,-1) and r = (3,0,5) + u(3,-1,2)