The forces F1, F2, . . . , Fn acting at the same point P are said to be in equilibrium if the resultant force is zero, that is, if F1 + F2 + ⋯ + Fn = 0.                                                                                                                                                  (a) Find the resultant force acting at P.                                                                                                                          (b) Find the additional force required (if any) for the forces to be in equilibrium.

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