Question 3 of 15 -/6.7 In a two-dimensional tug of-war, Alex. Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The time remains stationary in spite of the three pulls, Alex pulls with force F a of magnitude 218 N. and Charles pulls with force F e of magnitude 178 N. Note that the direction of F c is not given, What is the magnitude of Betty's force F a If Charles pulls In (a) the direction drawn in the picture or (b) the other possible direction for equilibrium? 140- [a) Number (b) Number Units