Two forces F1 and F2 act along the two sides of an equilateral triangle as shown in Figure P11.9. Point O is the intersection of the altitudes of the triangle. (a) Find a third force F3 to be applied at B and along BC that will make the total torque zero about the point O. (b) What If? Will the total torque change if F3 is applied not at B but at any other point along BC ?