Three forces are applied to an object, as shown in the figure. Force F1→ has a magnitude of 21.3 newtons (21.3 N) and is directed 30.0∘ to the left of the +y axis. Force F2→ has a magnitude of 14.4 N and points along the +x axis. What must be the (a) magnitude and (b) direction (specified by the angle θ in the drawing) of the third force F3→ such that the vector sum of the three forces is 0 N? (a) Number Units (b) Number Units